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nuvoton h ardware monitoring ic NCT7802Y with peci 3.0 interface date: feb /20 1 2 revision: 1. 2 http://
NCT7802Y feb, 2012 - i - version: 1.2 table of content - 1. general description ................................ ................................ ................................ ......... 1 2. features ................................ ................................ ................................ ................................ . 1 2.1 temperature measurement ................................ ................................ ............................ 1 2.2 voltage measurement ................................ ................................ ................................ ..... 1 2.3 fan control ................................ ................................ ................................ ..................... 1 2.4 event notification ................................ ................................ ................................ ............ 1 2.5 general ................................ ................................ ................................ ........................... 2 3. k ey specifications ................................ ................................ ................................ .............. 2 4. pin configuration ................................ ................................ ................................ ............... 3 5. pin description ................................ ................................ ................................ ..................... 3 5.1 pin type discription ................................ ................................ ............................... 3 5.2 pin discription ................................ ................................ ................................ .......... 4 6. description ................................ ................................ ................................ ............................ 6 6.1 general description ................................ ................................ ............................. 6 6.2 access interface ................................ ................................ ................................ .... 6 6.2.1 data write to the internal register ................................ ................................ ...................... 6 6.2.2 data read from the internal register ................................ ................................ .................. 6 6.3 address setting ................................ ................................ ................................ ...... 7 6.4 tempera ture monitor data format ................................ ................................ 7 6.4.1 the local temperature (on - die) data with 8 - bit 2`s complement format ............................. 7 6.4.2 the remote tempera ture data with 11 - bit 2?s complement format 6.5 voltage sense data format ................................ ................................ ............... 8 6.6 fan_in count calculation ................................ ................................ .............................. 8 6.7 fan_out duty cycle / dc level calculation ................................ ................................ 9 6.8 smart fan tm i v control parameters ................................ ................................ ........... 9 6.8.1 step up time / step down time ................................ ................................ ...................... 9 6.8.2 fan output start - up value ................................ ................................ ................................ 9 6.8.3 fan output nonstop ................................ ................................................................ ......... 9 6.8.4 f an output stop time ................................ ................................................................ ...... 9 6.9 smart fan tm iv ................................ ................................ ................................ ......... 10 6.10 peci ................................ ................................ ................................ .............................. 11 6.11 alert# output ................................ ................................ ................................ ............. 13 6.11.1 alert# output mechanism ................................ ................................ ......................... 13 6.11.2 alert# response address ................................ ................................ ......................... 14 6.12 t_crit# output ................................ ................................ ................................ ............ 14 6.13 smi# output ................................ ................................ ................................ .................. 14 6.13.1 temperature ................................ ................................ ................................ ................. 14 6.13.2 voltage ................................................................ ................................ ......................... 16
NCT7802Y feb, 2012 - ii - version: 1.2 6.13.3 fan ................................ ................................ ................................ ............................... 16 6.14 reset# output ................................ ................................ ................................ ............ 16 6.15 programming from eeprom ................................ ................................ ....................... 16 7. register description ................................ ................................ ................................ ...... 17 7.1 bank0 re gister map ................................ ................................ .............................. 17 7.2 bank 0 register detail ................................ ................................ ........................ 22 7.2.1 bank select register ................................ ................................ ................................ ...... 22 7.2.2 remote diode 1 temperature readout register (msb) ................................ ................ 22 7.2.3 remote diode 2 temperature readout register (msb) ................................ ................ 22 7.2.4 remote diode 3 temperature readout register (msb) ................................ ................ 22 7.2.5 local diode temperature readout register (msb) ................................ ....................... 23 7.2.6 tempera ture readout register (lsb) ................................................................ ............ 2 3 7.2.7 peci 0 temperature readout register (msb) ................................ ............................... 23 7.2.8 peci 1 temperature readout register (msb ) ................................ ............................... 23 7.2.9 read peci temperature readout register (lsb) ................................ ......................... 24 7.2.10 vcc readout register (msb) ................................ ................................ ...................... 24 7.2.11 vcore readout register (msb) ................................ ................................ ................... 24 7.2.12 vsen1 readout register (msb) ................................................................ .................. 24 7.2.13 vsen2 reado ut register (msb) ................................................................ .................. 25 7.2.14 vsen3 readout register (msb) ................................................................ .................. 25 7.2.15 voltage readout register (lsb) ................................................................ .................. 25 7.2.16 fan count 1 readout register (msb) ................................................................ .......... 25 7.2.17 fan count 2 readout register (msb) ................................................................ .......... 26 7 .2.18 fan count 3 readout register (msb) ................................................................ .......... 26 7.2.19 fan count readout register (lsb) ................................ ................................ .............. 26 7.2.20 mntimon percent register ................................ ................................ ......................... 26 7.2.21 diode fault alert status register ................................ ................................ ................. 27 7.2.22 temperature low alert status register ................................ ................................ ........ 27 7.2.23 temperature high alert status register ................................................................ ....... 27 7.2.24 fan alert status register ................................ ................................ ............................. 28 7.2.25 t_crit# alert status register ................................ ................................ ..................... 28 7.2.26 gpio alert status register ................................ ................................ ........................... 28 7.2.27 temperature smi status register ................................ ................................ ................ 29 7.2.28 voltage smi status register ................................ ................................ ......................... 29 7.2.29 fan smi status register ................................ ................................ .............................. 29 7.2.30 t_crit# real ti me status register ................................................................ ............ 30 7.2.31 start register ................................ ................................ ................................ ................ 30 7.2.32 mode selection register ................................ ................................ .............................. 30 7.2.33 peci enable register ................................ ................................ ................................ ... 30 7.2.34 fan enable register ................................ ................................ ................................ ..... 31 7.2.35 voltage monitor enable register ................................................................ .................. 31 7.2.36 conversion rate register ................................ ................................ ............................ 31 7.2.37 fault queue register ................................ ................................ ................................ ... 31
NCT7802Y feb, 2012 - iii - version: 1.2 7.2.38 alert# high limit link to t_crit# register ................................................................ .. 32 7.2.39 reset time setting register ................................ ................................ ......................... 32 7.2.40 reset limit low byte register ................................ ................................ ...................... 32 7.2.41 reset limit high byte register ................................ ................................ ..................... 32 7.2.42 smi# control register ................................ ................................................................ .. 33 7.2.43 rtd1 temperature high limit register ................................................................ ....... 33 7.2.44 rtd1 temperature low limit register ................................ ................................ ........ 33 7.2.45 rtd2 temperature high limit register ................................................................ ....... 34 7.2.46 rtd2 temperature low limit register ................................ ................................ ........ 34 7.2.47 rtd3 temperature high limit register ................................................................ ....... 34 7.2.48 rtd3 temperature low limit register ................................ ................................ ........ 34 7.2.49 ltd temperature high limit register ................................................................ .......... 34 7.2.50 ltd temperature low limit register ................................ ................................ ........... 35 7.2.51 dts temperature high limit register ................................................................ .......... 35 7.2.52 dts temperature low limit register ................................................................ .......... 35 7.2.53 rtd1 tcrit threshold register ................................ ................................ ................. 35 7.2.54 rtd2 tcrit threshold register ................................ ................................ ................. 35 7.2.55 rtd3 tcrit threshold register ................................ ................................ ................. 36 7.2.56 ltd tcrit threshold register ................................ ................................ .................... 36 7.2.57 dts tcr it threshold register ................................ ................................ .................... 36 7.2.58 vsen1 high limit low byte register ................................ ................................ ........... 36 7.2.59 vsen1 low limit low byte register ................................................................ ............ 36 7.2.60 vsen2 high limit low byte register ................................ ................................ ........... 37 7.2.61 vsen2 low limit low byte register ................................................................ ............ 37 7.2.62 vsen3 high limit low byte register ................................ ................................ ........... 37 7.2.63 vsen3 low limit low byte register ................................................................ ............ 37 7.2.64 vcc high limit low by te register ................................................................ ............... 37 7.2.65 vcc low limit low byte register ................................ ................................ ................ 38 7.2.66 vsen limit high byte 1 register ................................ ................................ ................. 38 7.2.67 vsen limit high byte 2 register ................................ ................................ ................. 38 7.2.68 fanin1 limit low byte register ................................................................ .................. 38 7.2.69 fan in2 limit low byte register ................................................................ .................. 39 7.2.70 fanin3 limit low byte register ................................................................ .................. 39 7.2.71 fanin1 limit high byte register ................................ ................................ ................. 39 7.2.72 fanin2 limit high byte register ................................ ................................ ................. 39 7.2.73 fanin3 limit high byte register ................................ ................................ ................. 40 7.2.74 alert mask register register ................................ ................................ .................... 40 7.2.75 alert/smi mask temperature channel register ................................ ....................... 40 7.2.76 alert/smi mask fan cha nnel register ................................ ................................ ..... 41 7.2.77 smi mask voltage channel register ................................ ................................ ............ 41 7.2.78 t_crit# mask register ................................ ................................ ............................... 41 7.2.79 gpio alert mask register ................................ ................................ ............................ 42 7.2.80 gpio enable register ................................ ................................ ................................ .. 42 7.2.81 gpio mode register ................................ ................................ ................................ .... 42
NCT7802Y feb, 2012 - iv - version: 1.2 7.2.82 gpio output type register ................................ ................................ .......................... 43 7.2.83 gpio input data register ................................ ................................ ............................. 43 7.2.84 gpio output data register ................................ ................................ .......................... 43 7.2.85 beep voltage channel enable register ................................ ................................ ...... 44 7.2.86 beep fan channel enable register ................................................................ ............ 44 7.2.87 beep temperature channel enable register ................................ .............................. 44 7.2.88 beep enable register ................................ ................................................................ . 45 7.2.89 fan control output type ................................ ................................ .............................. 45 7.2.90 fan control output mode ................................ ................................ ............................. 45 7.2.91 fan control 1 output value ................................ ................................ .......................... 46 7.2.92 fan control 2 output value ................................ ................................ .......................... 46 7.2.93 fan control 3 output value ................................ ................................ .......................... 46 7.2.94 close - loop fan control rpm mode register and configure register of peci error (crpe ) 46 7.2.95 temperature to fan mapping relationships register ................................ .................. 47 7.2.96 temperature to fan mapping relationships register ................................ .................. 47 7.2.97 fan control configuration register 1 ................................ ................................ ........... 48 7.2.98 fan control configuration register 2 ................................ ................................ ........... 48 7.2.99 fan control configuration register 3 ................................ ................................ ........... 49 7.2.100 fan control co nfiguration register 4 ................................ ................................ ......... 49 7.2.101 close - loop fan control rpm mode tolerance register ................................ ........... 49 7.2.102 fanctl step up time register ................................ ................................ ................ 50 7.2.103 fanctl step down time register ................................ ................................ ............ 50 7.2.104 default fan speed register ................................ ................................ ....................... 50 7.2.105 fanctl1 pwm prescalar register ................................ ................................ ........... 50 7.2.106 fanctl2 pwm prescalar register ................................ ................................ ........... 51 7.2.107 fanctl3 pwm prescala r register ................................ ................................ ........... 52 7.2.108 temp1 hystersis register ................................ ................................ .......................... 52 7.2.109 temp2 hystersis register ................................ ................................ .......................... 52 7.2.110 temp3 hystersis register ................................ ................................ .......................... 52 7.2.111 fanctl start duty cycle register ................................ ................................ ............ 53 7.2.112 fanctl stop time r egister ................................ ................................ ...................... 53 7.2.113 nonstop disable register ................................ ................................ .......................... 53 7.2.114 fan output min value when peci error register (fomv ) ................................ ......... 53 7.2.115 table 1 x - axis transition point 1 register ................................ ................................ . 54 7.2.116 table 1 x - axis transition point 2 register ................................ ................................ . 54 7.2.117 table 1 x - axis transition point 3 register ................................ ................................ . 54 7.2.118 table 1 x - axis transition point 4 register ................................ ................................ . 54 7.2.119 table 1 x - axis critical point register ................................ ................................ ......... 55 7.2.120 table 1 y - axis transition point 1 register ................................ ................................ . 55 7.2.121 table 1 y - axis transition point 2 register ................................ ................................ . 55 7.2.122 table 1 y - axis transition point 3 register ................................ ................................ . 55 7.2.123 table 1 y - axis transition poi nt 4 register ................................ ................................ . 56 7.2.124 table 2 x - axis transition point 1 register ................................ ................................ . 56
NCT7802Y feb, 2012 - v - version: 1.2 7.2.125 table 2 x - axis transition point 2 register ................................ ................................ . 56 7.2.126 table 2 x - axis transition point 3 register ................................ ................................ . 56 7.2.127 table 2 x - axis transition point 4 register ................................ ................................ . 57 7.2.128 table 2 x - axis critical point register ................................ ................................ ......... 57 7.2.129 table 2 y - axis transition point 1 register ................................ ................................ . 57 7.2.130 table 2 y - axis transition point 2 register ................................ ................................ . 57 7.2.131 table 2 y - axis transition point 3 register ................................ ................................ . 58 7.2 .132 table 2 y - axis transition point 4 register ................................ ................................ . 58 7.2.133 table 3 x - axis transition point 1 register ................................ ................................ . 58 7.2.134 table 3 x - axis transition point 2 register ................................ ................................ . 5 8 7.2.135 table 3 x - axis transition point 3 register ................................ ................................ . 59 7.2.136 table 3 x - axis transition point 4 r egister ................................ ................................ . 59 7.2.137 table 3 x - axis critical point register ................................................................ ......... 59 7.2.138 table 3 y - axis transition point 1 register ................................ ................................ . 59 7.2.139 table 3 y - axis transition point 2 register ................................ ................................ . 60 7.2.140 table 3 y - axis transition point 3 register ................................ ................................ . 60 7.2.141 table 3 y - axis transition point 4 register ................................ ................................ . 60 7.2.142 td1 offset register ................................ ................................................................ .... 60 7.2.143 td2 offset register ................................ ................................................................ .... 61 7.2.144 tr1 offset register ................................ ................................ ................................ .... 61 7.2.145 tr2 offset register ................................ ................................................................ .... 61 7.2.146 tr3 offset register ................................ ................................................................ .... 61 7.2.147 digital filter level select register ................................ ................................ .............. 62 7.2.148 programmable temperature 1 register ................................ ................................ ..... 62 7.2.149 programmable temperature 2 register ................................ ................................ ..... 62 7.2.150 software reset register ................................ ................................ ............................. 62 7.2.151 vendor id register ................................ ................................ ................................ ..... 63 7.2.152 chip id register ................................ ................................ ................................ ......... 63 7.2.153 version id register ................................ ................................ ................................ .... 63 7.3 bank 1 register map ................................ ................................ ............................. 64 7.4 bank 1 register detail ................................ ................................ ........................ 66 7.4.1 peci co ntrol register 1 ................................ ................................ ................................ . 66 7.4.2 peci control register 2 ................................ ................................ ................................ . 66 7.4.3 peci control register 3 ................................ ................................ ................................ . 66 7.4.4 report temperature style register ................................ ................................ ................ 67 7.4.5 address content for manual command register ................................ ........................... 67 7.4.6 writ e length for manual command register ................................ ................................ . 67 7.4.7 read length for manual command register ................................ ................................ . 68 7.4.8 command code for manual command r egister ................................ ............................ 68 7.4.9 agent0 base temperature register ................................ ................................ ............... 68 7.4.10 agent1 base temperature register ................................ ................................ ............. 68 7.4.11 generic write in data 1 to client register ................................ ................................ .... 69 7.4.12 generic write in data 2 to client register ................................ ................................ .... 69
NCT7802Y feb, 2012 - vi - version: 1.2 7.4.13 generic write in data 3 to client register ................................ ................................ .... 69 7.4.14 generic write in data 4 to client register ................................ ................................ .... 69 7.4.15 gener ic write in data 5 to client register ................................ ................................ .... 70 7.4.16 generic write in data 6 to client register ................................ ................................ .... 70 7.4.17 generic write in data 7 to client register ................................ ................................ .... 70 7.4.18 generic write in data 8 to client register ................................ ................................ .... 70 7.4.19 generic write in data 9 to client register ................................ ................................ .... 71 7.4.20 generic write in data 10 to client register ................................ ................................ .. 71 7.4.21 generic write in data 11 to client register ................................ ................................ .. 71 7.4.22 generic write in data 12 to client register ................................ ................................ .. 71 7.4.23 agent relative temperature register ................................ ................................ .......... 72 7.4.24 agent characteristic register ................................ ................................ ....................... 73 7.4.25 generic read out data 1 from client register ................................ ............................. 73 7.4.26 generic read out data 2 from client register ................................ ............................. 74 7.4.27 generic read out data 3 from client register ................................ ............................. 74 7.4.28 generic read out data 4 from cl ient register ................................ ............................. 74 7.4.29 generic read out data 5 from client register ................................ ............................. 74 7.4.30 generic read out data 6 from client register ................................ ............................. 75 7.4.31 generic read out data 7 from client register ................................ ............................. 75 7.4.32 generic read out data 8 from client register ................................ ............................. 75 7.4.33 generic read out data 9 from client register ................................ ............................. 75 8. electrical character istics ................................ ................................ ......................... 76 8.1 absolute maximum ratings ................................ ................................ .......................... 76 8.2 dc characteristics ................................ ................................ ................................ ........ 76 8.3 ac characteristics ................................ ................................ ................................ ........ 77 9. ordering information ................................ ................................ ................................ ..... 78 10. top marking specific ations ................................ ................................ .......................... 78 11. package drawing and dimensions ................................ ................................ .............. 79 12. revision history ................................ ................................ ................................ ................ 80
NCT7802Y feb, 2012 - 1 - version: 1.2 1. general description NCT7802Y is a nuvoton hardware monitor ic, which can monitor several critical hardware parameters of the systems, in cluding power supply voltages, fan speeds, and temperatures , to make the system work stabl y and efficiently, especially for ser ver and workstation applications. NCT7802Y support s one on - die and up to 5 remote temperature sensors with smbus interface . the re?s a 10 here?re 5 pure hardware event pins 2. features 2.1 temperature measurement ? ? ? ? ? 2.2 voltage measurement ? 2.3 fan control ? ? ? ? 2.4 event notification ? ?
NCT7802Y feb, 2012 - 2 - version: 1.2 2.5 general z provide up to 6 gpio pins (multi - function with fan control ). z i 2 c? compatible system management bus (smbus) z support 8 smbus address selection z programming from eeprom support z 3. 3 v 5% v cc operation z 20 - pin qfn package ( halogen free ) 3. k ey specifications z voltage monitoring accuracy vsen input ? 10mv vcc input ? 8 0mv z temperature sensor accuracy remote diode sensor accuracy (25~85 ? c) ? 1 ? c typ. on - chip temperature se nsor accuracy (25~70 ? c) ? 2 ? c typ. remote temperature sensor resolution 0.125 ? c on - chip temperature sensor resolution 1 ? c z supply voltage 3.3v ? 5% z operating supply current vcc 5 ma typ. vtt < 1ma z operating temperat ure range - 4 0 ? c ~ 8 5 ? c *1 * 1 guaranteed by design from - 40~ 8 5 degree c, 100% tested at 85 degree c.
NCT7802Y feb, 2012 - 3 - version: 1.2 4. pin configuration 5. pin description 5.1 pin type discription pin type pin attribute od 12 open - drain output pin with 12 ma sink capability in ts ttl level input pin and schmitt trigger , with 5v tolerance support v1 type of peci ain input pin (analog) out 12 output pin with 12 ma sink /source capability aout output pin (analog) p power or ground pin fanin3/gpio5 fanctl2/gpio4/add1 fanin2/gpio3 fanctl1/gpio2/add0 fanin1_gpio1 15 14 13 12 11 fanctl3/gpio6/add2 16 10 scl gnd 17 9 sda vcore 18 8 t_crit#/beep td2-/tr3/vsen3 19 7 alert#/smi# td2+/tr2/vsen2 20 6 reset# ? td1-/vref td1+/tr1/vsen1 vcc vtt peci NCT7802Y
NCT7802Y feb, 2012 - 4 - version: 1.2 5.2 pin discription p in no. p in name i/o function 1 td1 - ai n connect to thermal diode 1 cathode vref aout vref output for t hermistor function 2 td1+ ain connect to thermal dio de 1 anode tr1 thermistor 1 sensing input vsen1 voltage sensing input. detection range is 0~2.048v 3 vcc p power supply, voltage i nput 3 . 3v5% it is also a voltage sensing input 4 vtt p intel? cpu vtt power 5 peci v1 intel? cpu peci interface 6 reset# od 12 reset alarm output, for detect vcc power fault 7 alert# od 12 alarm output, for interrupt control (default) smi# alarm outp ut, for interrupt control 8 t_crit# od 12 t_crit alarm output, for interrupt or shutdown control. (default) beep beep ou tput when abnormal event occurs (frequency:300hz/600hz, tone=500ms) 9 sda in ts /od 12 sm bus bi - directional data 10 scl in ts sm bus clo ck 11 fanin1 in ts fan tachometer input (default) gpio1 in ts /od 12 /o ut 12 general purpose i/o function 12 fanctl1 out 12 / od 12 /a out fan speed control pwm/dc output it can be configured to pwm/dc mode by r egisters. default is pwm output as dc output, 256 steps output voltage scaled to 0~vcc gpio2 in ts /od 12 /o ut 12 general purpose i/o function 13 fanin2 in ts fan tachometer input (default) gpio3 in ts /od 12 /o ut 12 general purpose i/o function
NCT7802Y feb, 2012 - 5 - version: 1.2 p in no. p in name i/o function 14 fanctl2 out 12 /od 12 /a out fan speed control pwm/dc output it can be configured to pwm/dc mode by r egisters. default is pwm output as dc output, 256 steps output voltage scaled to 0~vcc gpio4 in ts /od 12 /o ut 12 general purpose i/o function 15 fanin3 in ts fan tachometer input (default) gpio5 in ts /od 12 /o ut 12 general purpose i/o function 16 fanctl3 out 12 / od 12 fan speed control pwm output gpio6 in ts /od 12 /o ut 12 general purpose i/o function 17 gnd p power supply ground 18 v core ain voltage sensing input. detection range is 0~2.048v 19 td2 - ain connect to t hermal dio de 2 cathode tr3 thermistor 3 sensing input vsen3 voltage sensing input. detection range is 0~2.048v 20 td2+ ain connect to thermal dio de 2 anode tr2 thermistor 2 sensing input vsen2 voltage sensing input. detection range is 0~2.048v
NCT7802Y feb, 2012 - 6 - version: 1.2 6. description 6.1 general description the NCT7802Y is a nuvoton hardware monitor ic, contains one on - die and up to 5 remote temperature sensors , with smbus and intel peci3.0 interface. there ? 6.2 access interface nct7 802y provides smbus to access the internal regist er, supports smbus byte write and byte read protocols. 6.2.1 data write to the internal register 6.2.2 data read from the internal register
NCT7802Y feb, 2012 - 7 - version: 1.2 6.3 address setting nct7 802y has three address pins and multi - function with fanctrl1~3, the smbus address will be strapped wh en vcc ready 100ms, during the 100ms, the level of strapping pins must be fixed. t he address will be retained as long as the vcc of nct7 802y is maintained. the pull - up power plane must be the same as the vcc power of nct7 802y . add0 (fanctrl1) add 1 (fanctrl2 ) add 2 (fanctrl3) address 0 0 0 0101 000x 0 0 1 0101 001x 0 1 0 0101 010x 0 1 1 0101 011x 1 0 0 0101 100x 1 0 1 0101 101x 1 1 0 0101 110x *1 1 1 1 0101 111x *2 x=read/write # bit *1 when set the NCT7802Y to address 5ch, eeprom loading function will be enable d , eeprom address has to be ach, refer to section 6.15 . *2 when set the NCT7802Y to address 5eh, eeprom loading function will be enable d , eeprom address has to be aeh, refer to section 6.15. 6.4 temperature monitor data format 6.4.1 the local temperature (on - die) data with 8 - bit 2`s complement format temperature 8 - bit digital output +127 c 0111,1111 +25 c 0001,1001 +2 c 0000,0010 +1 c 0000,0001 +0 c 0000,0000 - 1 c 1111,1111 - 2 c 1111,1110 - 25 c 1110,0111 - 128 c 1000,0000
NCT7802Y feb, 2012 - 8 - version: 1.2 6.4.2 the remote temperature d ata with 11 - bit 2 s complement format temperature 8 - bit digital output h igh byte 3 - bit digital output l ow byte +127.875 c 0111,1111 111x,xxxx +25.750 c 0001,1001 110x,xxxx +2.250 c 0000,0010 010x,xxxx +1.125 c 0000,0001 001x,xxxx +0.000 c 0000,0000 00 0x,xxxx - 1.125 c 1111,1110 111x,xxxx - 2.250 c 1111,1101 110x,xxxx - 25.750 c 1110,0110 010x,xxxx - 127.875 c 1000,0000 001x,xxxx 6.5 voltage sense data format mntvsen low byte together with mntvsen high byte forms the 10 - bit count value. if mntvsen high byte readout is read successively, the NCT7802Y will latch the mntvsen l ow byte for next read. then voltage readout high byte and low byte are combined to 10 - bitvoltagevalue . for vsen1~3 and vcore monitoring, real voltage calculations should follow the f ormula: voltage mntvsen high byte mntvsen low byte + 2 v 1 111, 1 0 1 0 00x x,xxxx + 1 v 01 1 1,1 101 0 0 x x,xxxx + 0.036 v 0 000,01 00 10 x x,xxxx + 0 v 0 000,0000 00x x ,xxxx for vcc monitoring, real voltage calculations should follow the formula: 6.6 fan_in count calculation the fan_in tachometer high byte and low byte are combined to 1 3 - bitcountvalue. real rpm (rotate per minute) calculation should follow the formula: in this formula, fanpoles stands fo r the number of ns pole pairs inside the fan. normally an n - s - n - s fan (fanpoles=4) generates 2 pulses after completing one rotation. 002 . 0 10 ) ( u lue bitcountva v voltage 004 . 0 10 ) ( u lue bitcountva v voltage ) 4 ( ) 13 ( 10 35 . 1 ) ( 6 fanpoles lue bitcountva rpm speed fan u u
NCT7802Y feb, 2012 - 9 - version: 1.2 6.7 fan_out duty cycle / dc level calculation the NCT7802Y provides 3 set of pwm for fan speed control. the duty cycle of pwm c an be programmed by an 8 - bit register. the expression of duty cycle can be represented as follow formula: the NCT7802Y provides 2 set of dc output for fan speed control on fanctl1 and fanctl2 . the dc output can be programmed by an 8 - bit register. the expression of dc level can be represented as follow formula: 6.8 s mart f an tm i v control parameters in s mart f an tm i v mode, there are some fan control parameters as below descriptions: 6.8.1 step up time / step down time s mart f an tm i v is designed for the smooth operation of the fan. the up time / down time register defines the time interval between successive duty increases or decreases. if this value is set too small, the fan will not have enough time to speed up after tuning the duty and sometimes may result in unstable fan speed. on the other hand, if up time / down time is set too large, the fan may not work fast enough to dissipate the heat. this register should never be set to 0 , otherwise, the fan duty will be abnormal. 6.8.2 fan output start - up value from still to rotate, the fan usually needs a higher fan output value to generate enough torque to conquer the restriction force. thus the fan output start - up value is used to turn on the fan with the specified output value. 6.8.3 fan outpu t nonstop it takes some time to bring a fan from still to working state. therefore, nonstop value are designed with first fanctl step output to keep the fan working when the system does not require the fan to help reduce heat but still want to keep the fas t response time to speed up the fan. 6.8.4 f an output stop time a time interval is specified to turn off the fan if s mart f an tm i v continuously requests to slow down the fan which has already reached the stop time . figure 6 - 1 smart fan tm iv control parameters % 100 255 value register bit - 8 programmed (%) cycle duty u 255 value register bit - 8 programmed ) v ( voltage output u vcc downtime stoptime uptime n o n s t o p s t a r t smart fan lowering fanspeed smart fan arising fan speed fanspeed
NCT7802Y feb, 2012 - 10 - version: 1.2 6.9 s mart f an tm iv s mart f an tm iv supports fan duty outputs mode and close loop fan control (rpm) mode to control the fan speed. the re ? re 3 slopes can be obtained by setting fanduty / rpm 1~ fanduty / rpm 4 and t1~t 4 through the registers. when the temperature rises, fan output will calculate the target fanduty / rpm based on the current slope. for example, a ssum ing tx is the current temperature and fanduty / rpm is the target , then t he slope: fan output: figure 6 - 2 s mart f an tm iv mechanism in addition, s mart f an tm iv can also set up critical temperature and hysteres is. if the current temperature exceeds critical temperature, external f an will be forced by maximum fanduty to meet the largest target fanduty or rpm , which is 0xff . the target fan duty & rpm value will be determined in accordance to the slope only when the temperature falls below (tcritical C critical hyst) . NCT7802Y provide 3 temperature sources select ion to map the fan, the algorithm will make a decision to control the fan as below figure: 2 3 2 / 2 3 / 3 2 t t rpm fanduty rpm fanduty x 2 2 2 2 arg x t tx rpm or fanduty rpm or fanduty et t ? f a n d u t y 1 / r p m 1 f a n d u t y 2 / r p m 2 f u l l s p e e d ( f f , 1 0 0 % ) o p e r a t i o n h y s t . t r c r i t i c a l c r i t i c a l h y s t . t 1 t 2 t 3 t 4 x 2 x 1 f a n d u t y 3 / r p m 3 f a n d u t y 4 / r p m 4 x 3 t x t y f a n d u t y / r p m ( u n i t r p m = 5 0 ) t e m p e r a t u r e
NCT7802Y feb, 2012 - 11 - version: 1.2 6.10 peci peci (platform environment control interface) is a new digital interface to read the cpu temperature of intel? cpus. with a bandwidth ranging from 2 kbps to 2 mbps, peci uses a single wire for self - clocking and data transfer. by interfacing to the digital thermal sensor (dts) in the intel ? cpu, peci reports a negative temperature (in counts) relative to the processor?s temperature at which the thermal control circuit (tcc) is activated. at the tcc activation temperature, the intel cpu will operate at reduced performance t o prevent the device from thermal damage. peci is one of the temperature sensing methods that the NCT7802Y supports. the NCT7802Y contains a peci master and reads the cpu peci temperature. the cpu is a peci client. the peci temperature values returning fr om the cpu are in counts which are approximately linear in relation to changes in temperature in degrees centigrade. however, this linearity is approximate and cannot be guaranteed over the entire range of peci temperatures. for further information, refe r to the peci specification. all references to temperature in this section are in counts instead of c. figure 6 - 3 shows a typical fan speed (pwm duty cycle) and peci temperature relationship. figure 6 - 3 peci temperature any temp request faster fan ?? any temp request f hold current speed ?? no no speed up hold current speed slow down yes yes t c o n t r o l t c c a c t i v a t i o n d u t y 1 d u t y 2 - 2 0 0 - 1 0 p e c i t e m p e r a t u r e ( c o u n t s ) f a n s p e e d ( p w m d u t y c y c l e )
NCT7802Y feb, 2012 - 12 - version: 1.2 in this illustration, when peci temperature is - 20, the pwm duty cycle for fan control is at duty2. when cpu is getting hotter and the peci temperature is - 10, the pwm duty cycle is at duty1. at tcontrol pec i temperature, the recommendation from intel is to operate the cpu fan at full speed. therefore duty1 is 100% if this recommendation is followed. the value of tcontrol can be obtained by reading the related machine specific register (msr) in the intel cpu. the tcontrol msr address is usually in the bios writer?s guide for the cpu family in question. refer to the relevant cpu documentation from intel for more information. in this example, tcontrol is - 10. when the peci temperature is below - 20, the duty cycl e is fixed at duty2 to maintain a minimum (and constant) rpm for the cpu fan. NCT7802Y?s fan control circuit can only accept positive real - time temperature inputs and limits setting ( when s mart f an tm i v mode). the device provides offset registers to ?shif t? the negative peci readings to positive values otherwise the fan control circuit will not function properly. the offset registers are the tbase registers located at bank 1 , index09h and index0ah. all default values of these tbase registers are 8?h00.these registers should be programmed with (positive) values so that the resultant value (tbase + peci) is always positive. the unit of the tbase register contents is count to match that of peci values. the resultant value (tbase + peci) should not be interpre ted as the temperature (whether in count or c) of the peci client (cpu). figure 6 - 4 temperature a nd fan speed relation after tbase offsets shows t he temperature/fan speed relationship after tbase offsets are applied (based o n figure 6 - 3 peci temperature ). this view is from the perspective of the NCT7802Y fan control circuit. figure 6 - 4 temperature a nd fan speed relation after tbase offsets assuming tbase is set to 100 and the peci temperature is - 15 , the real - time temperature value to the fan control circuit will be 85 ( - 15 + 100). the value of 55 (hex) will appear in the relevant real - time tempera ture register. while using s mart f an tm i v control function of NCT7802Y, bios/software must include tbase in determining the thresholds (limits). in this example, assuming tcontrol is - 10 and tbase is set to 100 ,
NCT7802Y feb, 2012 - 13 - version: 1.2 the threshold temperature value correspondin g to the 100% fan duty cycle event is 90 ( - 10+100). the value of 5a (hex) should be written to the relevant threshold register. tcontrol is typically - 10 to - 20 for peci - enabled cpus. base on that, a value of 85 ~100 for tbase could be set for proper op eration of the fan control circuit. this recommendation is applicable for most designs. in general, the concept presented in this section could be used to determine the optimum value of tcontrol to match the specific application. 6.11 alert# output the nct 7802 y alert# pin is an active - low open - drain output pin which is triggered when temperature measured and fan exceeds the limitation defined in the limit registers. 6.11.1 alert# output mechanism figure 6 - 5 shows the mechanism of the alert# output . in this mode, the nct 7802y will set the alert mask bit of configuration register during a read of the status register if any flag in status register, except the adc_busy flag and remote diode open flag, is set. this prevents further alert# triggering until the master has re set the alert mask bit (write 0 to alert_msk in bank0 cr[21h] bit7 ), at the end of the interrupt service routine. the status register flags are cleared only upon a read status register command from the master and will be re - alerted at the end of the next t emperature conversion if the measured temperature still falls outside of the allowed range. figure 6 - 5 alert# output mechanism t e m p l i m t t e m p e r a t u r e v a l u e a l e r t # s t a t u s a l e r t m a s k c l e a r m a s k r e g i s t e r r e a d s t a t u s r e g i s t e r a r a
NCT7802Y feb, 2012 - 14 - version: 1.2 6.11.2 alert # response address figure 6 - 6 shows the mecha nism of the smbus alert # response address (ara) support on alert# output. in this mode, the alert# output of the nct 7802y is connected to the smbus alert line which has more than one device connected to it. through such and implementation, smbus alert mode can assist the master in resolving which salve generates an interrupt. when the measured temperature falls outside of the allowed range, the alert# pin will be pulled low and the corresponding alert flags in status register will be set to 1. the alert # ma sk bit will just be set if there is a read command for status register or when ara occurs from master (alert response address is 0001100x). meanwhile, the nct 7802y will generate and return its own address to the master. if the temperature never falls outsi de of the allowed range, the latched alert# pin can release by the reset alert mask bit and the latched corresponding alert flags in status register can release by reading command for status register. figure 6 - 6 smbus ara mechanism 6.12 t_crit# output t_crit# output pulls low when the measured temperature exceeds the critical temperature threshold point . once the t_crit# output pulls low, it will not be set high until the measured temperature is lower than critica l temperature threshold point . 6.13 smi# output 6.13.1 temperature smi# for temperature monitoring provides 3 modes : comparator interrupt mode, two - times interrupt mode, and the one - time interrupt mode. 6.13.1.1. comparator interrupt mode temperature exceeding t o causes an i nterrupt and this interrupt will be reset when reading all of the interrupt status registers. once an interrupt event has occurred by exceeding t o , then reset, if the temperature remains above the t hyst , the interrupt will occur again when the next convers ion has completed. if an interrupt event has occurred by exceeding t o and not reset, the interrupts will not occur again. the interrupts will continue to occur in this manner until the temperature goes below t hyst .
NCT7802Y feb, 2012 - 15 - version: 1.2 6.13.1.2. two - times interrupt mode temperature exc eeding t o causes an interrupt and then temperature going below t hyst will also cause an interrupt if the previous interrupt has been reset by reading all the interrupt status register. once an interrupt event has occurred by exceeding t o , then reset, if th e temperature remains above the t hyst , the in terrupt will not occur. 6.13.1.3. one - time interrupt mode temperature exceeding t o causes an interrupt and then temperature going below t hyst will not cause an interrupt. once an interrupt event has occurred by exceeding t o , then going below t hyst, an interrupt will not occur again until the temperature exceeding t o .
NCT7802Y feb, 2012 - 16 - version: 1.2 6.13.2 voltage smi # interrupt for voltage is two - times interrupt mode. voltage exceed s high limit or going below low limit , it will causes an interrupt if the previous interrupt has been reset by reading all the interrup t status register. 6.13.3 fan smi # interrupt for fan is two - times interrupt mode. fan count exceed s the limit, or exceeding and then going below the limit, it will cause an interrupt if the pre vious interrupt has been reset by reading all the inte rrupt status register. 6.14 reset# output the NCT7802Y provides a reset controller for the system?s 3.3v supply rail. the reset# pin will pull low pulse when the measured vcc below the threshold voltage . the reset# pin set to ?1? after the 3.3v vcc supply rises above its threshold voltage . 6.15 self - programming from eeprom the NCT7802Y supports self - programming through an external i2c e eprom during NCT7802Y power - on . the eeprom is recommended to be 24c 02 type. during 200ms period after power on, nct 7802y will detect if the external eeprom exists by issuing the smbus byte read command with 50khz smbus clock frequency . i f a nack of smbus protocol is detected, NCT7802Y will stop self - programming , otherwise , NCT7802Y will keep load ing data from external eeprom sequentially to bank0 index 00h~e2h registers. therefore, other smbus master has to avoid from accessing NCT7802Y during the 200ms after power - o n. please also refer to NCT7802Y apn for self - programming implementation.
NCT7802Y feb, 2012 - 17 - version: 1.2 7. register description 7.1 bank0 register map i dx register name att d f 7 6 5 4 3 2 1 0 0 bank select r/w 00 rsv bksel 1 read rtd1 h igh b yte r 00 mntrtd1[10:3] 2 read rtd2 h igh b yte r 00 mntrtd2[10:3 ] 3 read rtd3 h igh b yte r 00 mntrtd3[10:3] 4 read ltd h igh b yte r 00 mntltd[ 7 : 0 ] 5 read temp l ow b yte r 00 mnttd_lsb[2:0] rsv 6 read p eci 0 temp high byte r 00 mntpeci0[9:2] 7 read p eci 1 temp high byte r 00 mntpeci1[9:2] 8 read peci l ow b yte r 00 mn tpeci_lsb[1:0] rsv 9 read vcc r 00 mntvcc[9:2] a read vcore r 00 mntvcore[9:2] c read vsen1 r 00 mntvsen1[9:2] d read vsen2 r 00 mntvsen2[9:2] e read vsen3 r 00 mntvsen3[9:2] f read volt l ow b yte r 00 mntv_lsb[1:0] rsv 10 read fan count 1high byte r ff mntfan1[12:5] 11 read fan count 2high byte r ff mntfan2[12:5] 12 read fan count 3high byte r ff mntfan3[12:5] 13 read fan count 1low byte r f8 mntfan_lsb[4:0] rsv 15 mntimon_percent r 00 mntimon_percent 17 diode fault alert status r 00 rsv sts_df3 sts_df2 sts_df1 18 low alert status r 00 rsv sts_pec i1 sts_pec i0 sts_al4 sts_al3 sts_al2 sts_al1 19 high alert status r 00 rsv sts_pec i1 sts_pec i0 sts_ah4 sts_ah3 sts_ah2 sts_ah1 1a fan alert status r 00 rsv fan_tar 3 fan_tar 2 fan_tar 1 rsv fan_fc3 fan_f c2 fan_fc1 1b tcrit alert status r 00 rsv sts_pec i1 sts_pec i0 sts_tc4 sts_tc3 sts_tc2 sts_tc1 1c gpio alert st atu s r 00 rsv sts_gpi o6 sts_gpi o5 sts_gpi o4 sts_gpi o3 sts_gpi o2 sts_gpi o1 1d smi temp status r 00 rsv sts_pec i1 sts_pec i0 sts_ltd sts_rtd 3 sts _rtd 2 sts_rtd 1 1e smi voltage status r 00 rsv sts_ vcc sts_vse n3 sts_vse n2 sts_vse n1 1f smi fan status r 00 rsv fan_tar 3 fan_tar 2 fan_tar 1 rsv fan_fc3 fan_fc2 fan_fc1 20 tcrit real time status r 00 rsv ltd_texc rtd3_te xc rtd2_te xc rtd1_te xc
NCT7802Y feb, 2012 - 18 - version: 1.2 i dx register name att d f 7 6 5 4 3 2 1 0 21 start r/w 01 msk_alert rsv start 22 mode selection r/w 7f rsv enltd rtd3_md rtd2_md rtd1_md 23 peci enable r/w 00 rsv enp eci 1 enp eci 0 24 fan enable r/w 07 rsv enfan3 enfan2 enfan1 25 voltage monitor enable r/w 03 rsv envcore envcc 26 con v ersion rate r/w 03 rsv convrate[1:0] 27 fault queue r/w 03 rsv faultqueue[1:0] 28 alert high link to t_crit # r/w 00 rsv sys3 sys2 sys1 29 reset time setting r/w 04 rsv setresettime 2a reset limit low byte r/w ee resetlimit[7:0] 2b reset limit high byte r/w 80 resetlimit[ 9:8] rsv 2f smi control r/w 00 a lert _s mi _sel tcrit _b eep _sel smi_mo d smi_pol ovt_mo d en_smi tempsmimode 30 rtd 1 temp high limit r/w 55 rtd1_hl 31 r td 1 temp low limit r/w 00 rtd1_ll 32 rtd 2 temp high limit r/w 55 rtd2_hl 33 rtd 2 temp low limit r/w 00 rt d2_ll 34 r td 3 temp high limit r/w 55 rtd3_hl 35 rtd 3 temp low limit r/w 00 rtd3_ll 36 ltd temp high limit r/w 55 ltd_hl 37 ltd temp low limit r/w 00 ltd_ll 38 dts temp high limit r/w 55 dts_hl 39 dts temp low limit r/w 00 dts_ll 3a rtd 1 tcrit t hresh old r/w 64 tcrit_rtd1 3b rtd 2 tcrit t hreshold r/w 64 tcrit_rtd2 3c rtd 3 tcrit t hreshold r/w 64 tcrit_rtd3 3d ltd tcrit t hreshold r/w 64 tcrit_ltd 3e dts tcrit t hreshold r/w 64 tcrit_dts 3f vsen1 high limit l ow byte r/w ff vsen1_hl[7:0] 40 vsen1 low l imit low byte r/w 00 vsen1_ll[7:0] 41 vsen2 high limit low byte r/w ff vsen2_hl[7:0] 42 vsen2 low limit low s byte r/w 00 vsen2_ll[7:0] 43 vsen3 high limit low byte r/w ff vsen3_hl[7:0] 44 vsen3 low limit low byte r/w 00 vsen3_ll[7:0] 45 vcc high limit low byte r/w ff vcc_hl[7:0] 46 vcc low limit low byte r/w 00 vcc_ll[7:0] 47 vsen high byte 1 r/w cc vsen1_hl[9:8] vsen1_ll[9:8] vsen2_hl[9:8] vsen2_ll[9:8]
NCT7802Y feb, 2012 - 19 - version: 1.2 i dx register name att d f 7 6 5 4 3 2 1 0 48 vsen high byte 2 r/w cc vsen3_hl[9:8] vsen3_ll[9:8] vcc_hl[9:8] vcc_ll[9:8] 49 fanin1 limit low byte r/w ff fanin1_hl[7:0] 4a fanin2 limit low byte r/w ff fanin2_hl[7:0] 4b f anin3 limit low byte r/w ff fanin3_hl[7:0] 4c fanin1 limit high byte r/w f8 fanin1_hl[12:8] rsv 4d fanin2 limit high byte r/w f8 fanin2_hl[12:8] rsv 4e fanin3 limit high byte r/w f8 fanin3_hl[12:8] rsv 4f alert m a sk function r/w 7f rsv msk_tc msk_gpi o msk_tar t msk_fc msk_ah msk_al msk_df 50 alert / smi mask temp channel r/w 3f rsv msk_peci 1 msk_peci 0 msk_ltd msk_rtd 3 msk_rtd 2 msk_rtd 1 51 alert / smi mask fan channel r /w 07 rsv msk_fan3 msk_fan 2 msk_fan 1 52 smi mask volt age channel r/w 8f msk_reset rsv msk_vcc msk_vse n3 msk_vse n2 msk_vse n1 53 t crit mask r/w bf msk_ all rsv msk_peci 1 msk_peci 0 msk_ ltd msk_ rtd 3 msk_ rtd 2 msk_ rtd 1 54 gpio alert mask r/w 3f rsv msk_gpi o6 m sk_gpi o5 msk_gpi o4 msk_gpi o3 msk_gpi o2 msk_gpi o1 55 gpio enable r/w 00 rsv engpio6 engpio5 engpio4 engpio3 engpio2 engpio1 56 gpio mode r/w 3f rsv gpio6 mode gpio5 mode gpio4 mode gpio3 mode gpio2 mode gpio1 mode 57 gpio output t ype r/w 00 rsv gpio6 ob gpio5 ob gpio4 ob gpio3 ob gpio2 ob gpio1 ob 58 gpio input data r 00 rsv gpio6 in gpio5 in gpio4 in gpio3 in gpio2 in gpio1 in 59 gpio output data r/w 00 rsv gpio6 out gpio5 out gpio4 out gpio3 out gpio2 out gpio1 out 5a beep voltage enable r/w 00 rsv e nbp_re set enbp_vc c enbp_v3 enbp_v2 enbp_v1 5b beep fan enable r/w 00 rsv enbp_fa n3 enbp_fa n2 enbp_fa n1 5c beep t emp enable r/w 00 rsv enbp_pe ci1 enbp_pe ci0 enbp_lt d enbp_rt d3 enbp_rt d2 enbp_rt d1 5d beep enable r/w 00 rsv enbp_sm i enbp_df enbp_al enbp_ah enbp_tc beep_en 5e fan control output type r/w 00 rsv endcfa n2 endcfa n1 5f fan control o utput m ode r/w 00 rsv pwm3_p ol pwm2_p ol pwm1_p ol rsv pwm3_o d pwm2_o d pwm1_o d 60 fan control 1 output value rw 7f fanduty1 61 fan control 2 output value rw 7f fandu ty2 62 fan control 3 output value rw 7f fanduty3 63 close - loop fan control rpm mode register and configure register of peci error rw 00 twodimension rpm_high_en pecierr 64 temperature to fan mapping relationships rw 00 rsv temp2fanselect rsv temp1fans elect 65 temperature to fan mapping relationships rw 00 rsv temp3fanselect 66 configuration register 1 rw 00 temp2_sh are_en temp2_share_sel temp1_s hare_en temp1_share_sel 67 configuration register 2 rw 00 rsv temp3_s hare_en temp3_share_sel 68 confi gur ation register 3 rw 00 rsv temp2_sour_sel rsv temp1_sour_sel
NCT7802Y feb, 2012 - 20 - version: 1.2 i dx register name att d f 7 6 5 4 3 2 1 0 69 configuration register 4 rw 00 rsv temp3_sour_sel 6d close - loop fan control rpm mode tolerance rw 02 rsv generic_tol_rpm 6e fanctl step up time rw 0a uptime 6f fanctl step down time rw 0a downtime 70 defaultfanspeed r w 7f defaultfanspeed 71 pwm1 prescalar rw 84 fanoutdivi sor1[7] fanoutdivisor1[6:0] 72 pwm2 prescalar rw 84 fanoutdivi sor2[7] fanoutdivisor2[6:0] 73 pwm3 prescalar rw 84 fanoutdivi sor3[7] fanoutdivisor3[6:0] 74 temp1 hyster sis rw 53 rsv criti_hyst1 rsv oper_hyst1 75 temp2 hystersis rw 53 rsv criti_hyst2 rsv oper_hyst2 76 temp3 hystersis rw 53 rsv criti_hyst3 rsv oper_hyst3 77 fanctl start duty cycle rw 30 startdutycycle 78 stop time of fanctl rw ff stoptime 79 nonstop e nable rw 00 rsv nonstop 7 a fan output min value when peci error rw 80 min duty_pecierr 80 table 1 transition point 1 rw 19 temp1table_tr1 81 table 1 transition point 2 rw 23 temp1table_tr2 82 table 1 transition point 3 rw 2d temp1table_tr3 83 table 1 t ransition point 4 rw 37 temp1table_tr4 84 table 1 critical point rw 3c temp1table_trcritical 85 table 1 y - axis transition point 1 rw 8c temp1table_fl1 86 table 1 y - axis transition point 2 rw aa temp1table_fl2 87 table 1 y - axis transition point 3 rw c8 temp1table_fl3 88 table 1 y - axis transition point 4 rw e6 temp1table_fl4 90 table 2 transition point 1 rw 19 temp2table_tr1 91 table 2 transition point 2 rw 23 temp2table_tr2 92 table 2 transition point 3 rw 2d temp2table_tr3 93 table 2 transition poi nt 4 rw 37 temp2table_tr4 94 table 2 critical point rw 3c temp2table_trcritical 95 table 2 y - axis transition point 1 rw 8c temp2table_fl1 96 table 2 y - axis transition point 2 rw aa temp2table_fl2 97 table 2 y - axis transition point 3 rw c8 temp2table_fl 3 98 table 2 y - axis transition point 4 rw e6 temp2table_fl4 a0 table 3 transition point 1 rw 19 temp3table_tr1 a1 table 3 transition point 2 rw 23 temp3table_tr2
NCT7802Y feb, 2012 - 21 - version: 1.2 i dx register name att d f 7 6 5 4 3 2 1 0 a2 table 3 transition point 3 rw 2d temp3table_tr3 a3 table 3 transition point 4 rw 37 te mp3table_tr4 a4 table 3 critical point rw 3c temp3table_trcritical a5 table 3 y - axis transition point 1 rw 8c temp3table_fl1 a6 table 3 y - axis transition point 2 rw aa temp3table_fl2 a7 table 3 y - axis transition point 3 rw c8 temp3table_fl3 a8 table 3 y - axis transition point 4 rw e6 temp3table_fl4 c1 td1 offset r/w 3d rsv offset_ td 1 c2 td2 offset r/w 3d rsv offset_ td 2 c4 t r 1 offset r/w 00 rsv offset_tr1 c5 t r 2 offset r/w 00 rsv offset_tr2 c6 t r 3 offset r/w 00 rsv offset_tr3 cb filter level s elect r/w 00 ldt rt3 rt2 rt1 e3 program m able temperature 1 r/w 00 pgm_temp1[7:0] e4 program m able temperature 2 r/w 00 pgm_temp2[7:0] fc soft reset w -- init rsv fd vendor id r 50 vendor id fe chipid r c3 chipid ff version id r 2 x version id (x=1,2,3 )
NCT7802Y feb, 2012 - 22 - version: 1.2 7.2 b ank 0 register detail 7.2.1 b ank select register location : index 00h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv bksel func. bksel : bank selection , 0=bank0 , 1=bank1 7.2.2 remote diode 1 temperature readout register (msb) l ocation : index 01h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntrtd1[10:3] func. mntrtd1[10:3] : readout of rtd1 high byte 7.2.3 remote diode 2 temperature readout registe r (msb) location : index 02h type : read only power on def ault value : 00h bit 7 6 5 4 3 2 1 0 name mntrtd2[10:3] func. mntrtd2[10:3] : readout of rtd2 high byte 7.2.4 remote diode 3 temperature readout registe r (msb) location : index 03h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntrtd 3[10:3] func. mntrtd3[10:3] : readout of rtd3 high byte
NCT7802Y feb, 2012 - 23 - version: 1.2 7.2.5 local diode temperature readout registe r (msb) location : index 04h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntltd[ 7 : 0 ] func. mntltd[ 7 : 0 ] : readout of ltd temperat ure 7.2.6 temperature readout regi ster (lsb) location : index 05h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mnttd_lsb[2:0] rsv func. mnttd _lsb [ 2 : 0 ] : readout of td low byte 7.2.7 peci 0 temperature readout register (msb) location : ind ex 0 6 h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mnt peci0 [ 9 : 2 ] func. mnt peci0 [ 9 : 2 ] : readout of peci0 high byte 7.2.8 p eci 1 temperature readout register (msb) location : index 07h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntpeci1[9:2] func. mntpeci1[9:2] : readout of peci1 high byte
NCT7802Y feb, 2012 - 24 - version: 1.2 7.2.9 read peci temperature readout register (lsb) location : index 08h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntpeci_lsb[1:0] rsv func. m ntpeci_lsb[1:0] : readout of peci low byte 7.2.10 vcc readout register (msb) location : index 09h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntvcc[9:2] func. mntvcc[9:2] : readout of vcc high byte 7.2.11 vcore readout register (msb) loca tion : index 0ah type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntvcore[9:2] func. mntvcore[9:2] : readout of vcore high byte 7.2.12 vsen1 readout register (msb) location : index 0ch type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntvsen1[9:2] func. mntvsen1[9:2] : readout of vsen1 high byte
NCT7802Y feb, 2012 - 25 - version: 1.2 7.2.13 vsen2 readout register (msb) location : index 0dh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntvsen2[9:2] func. mntvsen2[9:2] : readout of vsen2 high byte 7.2.14 vsen3 readout register (msb) location : index 0eh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntvsen3[9:2] func. mntvsen3[9:2] : readout of vsen3 high byte 7.2.15 voltage readout register (lsb) location : index 0fh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name mntv_lsb[1:0] rsv func. mntv_lsb[1:0] : readout of voltage low byte 7.2.16 fan count 1 readout register (msb) location : index 10h type : read only power on default value : ff h bit 7 6 5 4 3 2 1 0 name mntfan1[12:5] func. mntfan1[12:5] : readout of fan count 1 high byte
NCT7802Y feb, 2012 - 26 - version: 1.2 7.2.17 fan count 2 readout register (msb) location : index 11h type : read only power on default value : ff h bit 7 6 5 4 3 2 1 0 name mntfan2[12:5] func. mntfan2[12:5] : reado ut of fan count 2 high byte 7.2.18 fan count 3 readout register (msb) location : index 12h type : read only power on default value : ff h bit 7 6 5 4 3 2 1 0 name mntfan3[12:5] func. mntfan3[12:5] : readout of fan count 3 high byte 7.2.19 fan count readout register ( lsb) location : index 13h type : read only power on default value : f8 h bit 7 6 5 4 3 2 1 0 name mntfan_lsb[4:0] rsv func. mntfan_lsb[4:0] : readout of fan count low byte 7.2.20 mntimon percent register location : index 15h type : read only power on default va lue : 00h bit 7 6 5 4 3 2 1 0 name mntimon_percent func. mntimon_percent : imon percent , the voltage input is v core (0.9v=100%)
NCT7802Y feb, 2012 - 27 - version: 1.2 7.2.21 diode fault alert status register location : index 17h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_df3 sts_df2 sts_df1 func. sts_df3 : 1 indicates the td3 fault sts_df2 : 1 indicates the td2 fault sts_df1 : 1 indicates the td1 fault 7.2.22 temperature low alert status register location : index 18h type : read only power on default value : 00h b it 7 6 5 4 3 2 1 0 name rsv sts_peci1 sts_peci0 sts_al4 sts_al3 sts_al2 sts_al1 func. sts_peci1 : 1 indicates the peci1 over low limit sts_peci0 : 1 indicates the peci0 over low limit sts_al4 : 1 indicates the ltd over low limi t sts_al3 : 1 indicates the rtd3 over low limit sts_al2 : 1 indicates the rtd2 over low limit sts_al1 : 1 indicates the rtd1 over low limit 7.2.23 temperature high alert status register location : index 19h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_p e ci1 sts_pe ci0 sts_ah 4 sts_ah 3 sts_ah 2 sts_ah 1 func. sts_peci1 : 1 indic ates the peci1 over high limit sts_peci0 : 1 indicates the peci0 over high limit sts_ah4 : 1 indicates the ltd over high limit sts_ah3 : 1 indicates the rtd3 over high limit sts_ah2 : 1 indicates the rtd2 over high limit sts_ah1 : 1 indicates the rtd1 over high limit
NCT7802Y feb, 2012 - 28 - version: 1.2 7.2.24 fan alert status register location : index 1ah type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv fan_tar 3 fan_tar 2 fan_tar 1 rsv fan_fc3 fan_fc 2 fan_fc1 func. fan_tar3 : 1 indicates the fan3 is drive d to fully speed over 3 minutes fan_tar 2 : 1 indicates the fan 2 is drive d to fully speed over 3 minutes fan_tar 1 : 1 indicates the fan 1 is drive d to fully speed over 3 minutes fan_fc3 : 1 indicates t he fan3 over limit . fan_fc2 : 1 indicates the fan2 over limit fan_fc1 : 1 indicates the fan1 over limit 7.2.25 t_crit# alert status register location : index 1bh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_pe ci1 sts_pe ci0 sts _tc4 sts_tc3 sts_tc2 sts_tc1 func. sts_peci1 : 1 indi cates the peci1 t_crit# asserts sts_peci0 : 1 indi cates the peci0 t_crit# asserts sts_tc4 : 1 in dicates the ltd t_crit# asserts sts_tc3 : 1 ind icates the rtd3 t_crit# asserts sts_tc2 : 1 ind icates the r td2 t_crit# asserts sts_tc1 : 1 ind icates the rtd1 t_crit# asserts 7.2.26 gpio alert status register location : index 1ch type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_gpi o 6 sts_gpio 5 sts_gpio 4 sts_gpio 3 sts_gpio 2 sts_gpio 1 fu nc. sts_gpio6 : 1 in dicates the gpio6 event asserts sts_gpio5 : 1 indicates the gpio5 event asserts sts_gpio4 : 1 in dicates the gpio4 event asserts sts_gpio3 : 1 in dicates the gpio3 event asserts sts_gpio2 : 1 in dicates the gpio2 event asserts sts_gpio1 : 1 in dicates the gpio1 event asserts
NCT7802Y feb, 2012 - 29 - version: 1.2 7.2.27 temperature smi status register location : index 1dh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_pe ci1 sts_pe ci0 sts_lt d4 sts_rt d3 sts_rt d2 sts_rt d1 func. sts_peci1 : 1 indica tes t he peci1 smi event asserts sts_peci0 : 1 indica tes the peci0 smi event asserts sts_ltd : 1 indi cates the ltd smi event asserts sts_rtd3 : 1 indic ates the rtd3 smi event asserts sts_rtd2 : 1 indic ates the rtd2 smi event asserts sts_rtd1 : 1 indic ates the rt d1 smi event asserts 7.2.28 v oltage smi status register location : index 1eh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sts_ vcc sts_ vsen3 sts_ vsen 2 sts_ vsen1 func. sts_ vcc : 1 indicates the vcc over limit sts_ vsen3 : 1 indicate s the vsen3 over limit sts_ vsen 2 : 1 indicates the vsen2 over limit sts_ vsen 1 : 1 indicates the vsen1 over limit 7.2.29 fan smi status register location : index 1fh type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv fan_ta r3 fan_ta r2 fa n_ta r1 rsv fan_fc 3 fan_fc 2 fan_fc 1 func. fan_tar3 : 1 indicates the fan3 is drive d to fully speed over 3 minutes fan_tar3 : 1 indicates the fan2 is drive d to fully speed over 3 minutes fan_tar3 : 1 indicates the fan1 is drive d to fully speed over 3 minute s fan_fc3 : 1 indicates the fan3 over limit fan_fc2 : 1 indicates the fan 2 over limit fan_fc1 : 1 indicates the fan1 over limit
NCT7802Y feb, 2012 - 30 - version: 1.2 7.2.30 t_crit# real time status register location : index 20h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 nam e rsv ltd_texc rtd3_texc rtd2_texc rtd1_texc func. ltd _ texc : 1 indicates the ltd over the shutdown threshold rtd3_texc : 1 indicates the r td3 over the shutdown threshold rtd2_texc : 1 indicates the r td2 over the shutdown threshold rtd1_texc : 1 indicates the rtd1 over the shutdown threshold 7.2.31 start register location : index 2 1 h type : read /write power on default value : 01h bit 7 6 5 4 3 2 1 0 name msk_alert rsv start func. msk_alert : 1 indica tes the alert# output is masked start : 1 indicates the adc is operating 7.2.32 mode selection register location : index 22h type : read /write power on default value : 7f h bit 7 6 5 4 3 2 1 0 name rsv enltd rtd3_md rtd2_md rtd1_md func. enltd : 1 ind icates the ltd function enabled rtd3_md : 00=closed , 01= reserved , 1 0=thermistor mode , 11=voltage sense rtd2_md : 00=closed , 01=current mode , 10=thermistor mode , 11=voltage sense rtd1_md : 00=closed , 01=current mode , 10=thermistor mode , 11=voltage sense 7.2.33 peci enable register location : index 23h type : read /write p ower on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv enpeci1 enpeci0 func. enpeci1 : 1 indicates the peci1 enabled enpeci0 : 1 indicates the peci0 enabled
NCT7802Y feb, 2012 - 31 - version: 1.2 7.2.34 fan enable register location : index 2 4 h type : read /write power on default value : 07h bit 7 6 5 4 3 2 1 0 name rsv enfan3 enfan2 enfan1 func. en fan3 : 1 indicates the fanin3 enabled enfan2 : 1 indicates the fanin2 enabled enfan1 : 1 indicates the fanin1 enabled 7.2.35 voltage monitor enable register location : index 2 5 h type : read /write power on d efault value : 03h bit 7 6 5 4 3 2 1 0 name rsv envcore envcc func. envcore : 1 indicates the vcore enabled envcc : 1 indicates the vcc enabled 7.2.36 conversion rate register location : index 26h type : read /write power on default value : 03h bit 7 6 5 4 3 2 1 0 name rsv convrate[1:0] func. convrate[1:0] : 00= 1hz , 01= 2hz , 10= 4hz , 11= free run 7.2.37 fault queue register location : index 27h type : read /write power on default value : 03h bit 7 6 5 4 3 2 1 0 name rsv faultqueue[1:0] func. faultqueue [1:0] : fa ult queue of thermal shutdown , 00=1 , 01=2 , 10=3 , 11= 4
NCT7802Y feb, 2012 - 32 - version: 1.2 7.2.38 ale rt# high limit link to t_crit# register location : index 2 8 h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv sys3 sys2 sys1 func. sys3 : 1 indicates t he external diode3 channel high limit will be linked to t_crit# sys2 : 1 indicates t he external diode2 channel high limit will be linked to t_crit# sys1 : 1 indicates t he external diode1 channel high limit will be linked to t_crit# 7.2.39 reset time setting register locati on : index 29h type : read /write power on default value : 04h bit 7 6 5 4 3 2 1 0 name rsv setresettime func. setresettime : 000=1ms , 001=12.5ms , 010=50ms , 011=100ms 100=200ms , 101=400ms , 110=800ms , 111=1600ms 7.2.40 reset limit low byte r egister location : index 2ah type : read /write power on default value : ee h bit 7 6 5 4 3 2 1 0 name resetlimit[7:0] func. resetlimit[7:0] : reset limit low byte 7.2.41 reset limit high byte register location : index 2bh type : read /write power on default va lue : 80h bit 7 6 5 4 3 2 1 0 name resetlimit [ 9 : 8 ] rsv func. resetlimit[9:8] : reset limit high byte the reset voltage threshold formula = vreset - thd / 0.004 for example, the reset voltage shreshold is 3.0 v, the registers setting will be: 3.0 / 0.004 = 750 , the index[2bh]=80h, index[2ah]= ee h.
NCT7802Y feb, 2012 - 33 - version: 1.2 7.2.42 smi # control register location : index 2f h type : read /write power on default value : 0 0h bit 7 6 5 4 3 2 1 0 name alert_ smi_sel tcrit _b eep_sel smi_mo d smi_pol tcrit _m od en_smi temps mi mode func. alert_smi_sel : 0= alert , 1= smi tcrit _beep_sel : 0= tcrit , 1= beep smi_mod : 1 = level mode, 0 = pulse mode (pulse width is 200us) sm i _pol : refer to below table. tcrit _mod : 0= active low , 1= active high en_smi : 0= disable , 1= enable smi tempsmimode : 00= comp arator mode , 01= one time mode 10= two t imes mode , 11= two times mode smi_md smi_pol smi# 0 0 low pulse 0 1 high pulse 1 0 high level 1 1 low level 7.2.43 rtd1 temperature high limit register location : index 30h type : read /write power on defau lt value : 55h bit 7 6 5 4 3 2 1 0 name rtd1_hl func. rtd1_hl : rtd1 temperature high limit setting for alert# and smi # 7.2.44 rtd1 temperature low limit register location : index 31h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rtd 1_ll func. rtd1_ll : rtd1 temperature low limit setting for alert# and smi #
NCT7802Y feb, 2012 - 34 - version: 1.2 7.2.45 rtd2 temperature high limit register location : index 32h type : read/write power on default value : 55h bit 7 6 5 4 3 2 1 0 name rtd2_hl func. rtd2_hl : rtd2 temperature high limit setting for alert# and sm i# 7.2.46 rtd2 temperature low limit register location : index 33h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rtd2_ll func. rtd2_ll : rtd2 temperature low limit setting for alert# and smi # 7.2.47 rtd3 tempe rature high limit register location : index 34h type : read/write power on default value : 55h bit 7 6 5 4 3 2 1 0 name rtd3_hl func. rtd3_hl : rtd3 temperature high limit setting for alert# and smi # 7.2.48 rtd3 temperature low limit register location : index 35h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rtd3_ll func. rtd3_ll : rtd3 temperature low limit setting for alert# and smi # 7.2.49 ltd temperature high limit register location : index 36h type : read /write power on default value : 55h bit 7 6 5 4 3 2 1 0 name ltd_hl func. ltd_hl : ltd temperature high limit setting for alert# and smi #
NCT7802Y feb, 2012 - 35 - version: 1.2 7.2.50 ltd temperature low limit register location : index 37h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name ltd_ll func. lt d_ll : ltd temperature low limit setting for alert# and smi # 7.2.51 dts temperature high limit register location : index 38h type : read/write power on default value : 55h bit 7 6 5 4 3 2 1 0 name dts_hl func. dts_hl : dts temperature high limit setting for al ert# and smi # 7.2.52 dts temperature low limit register location : index 39h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name dts_ll func. dts_ll : dts1 temperature low limit setting for alert# and smi # 7.2.53 rtd1 tcrit threshold register loc ation : index 3 a h type : read/write power on default value : 64 h bit 7 6 5 4 3 2 1 0 name tcrit_rtd1 func. tcrit_rtd1 : rtd1 temperature threshold of t_crit# 7.2.54 rtd2 tcrit threshold register location : index 3bh type : read/write power on default value : 6 4h bit 7 6 5 4 3 2 1 0 name tcrit_rtd2 func. tcrit_rtd2 : rtd2 temperature threshold of t_crit#
NCT7802Y feb, 2012 - 36 - version: 1.2 7.2.55 rtd3 tcrit threshold register location : index 3ch type : read/write power on default value : 64h bit 7 6 5 4 3 2 1 0 name tcrit_rtd3 func. tcrit_rtd3 : rt d3 temperature threshold of t_crit# 7.2.56 ltd tcrit threshold register location : index 3dh type : read/write power on default value : 64h bit 7 6 5 4 3 2 1 0 name tcrit_ltd func. tcrit_ltd : ltd temperature threshold of t_crit# 7.2.57 dts tcrit threshold register location : index 3eh type : read/write power on default value : 64h bit 7 6 5 4 3 2 1 0 name tcrit_dts func. tcrit_dts : dts temperature threshold of t_crit# 7.2.58 vsen1 high limit low byte register location : index 3fh type : read/write power on default valu e : ffh bit 7 6 5 4 3 2 1 0 name vsen1_hl[7:0] func. vsen1_hl : vsen1 high limit low byte 7.2.59 vsen1 low limit low byte register location : index 40h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name vsen1_ll[7:0] func. vsen1_ll : vse n1 low limit low byte
NCT7802Y feb, 2012 - 37 - version: 1.2 7.2.60 vsen2 high limit low byte register location : index 41h type : read/write power on default value : ffh bit 7 6 5 4 3 2 1 0 name vsen2_hl[7:0] func. vsen2_hl : vsen2 high limit low byte 7.2.61 vsen2 low limit low byte register location : index 42h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name vsen2_ll[7:0] func. vsen2_ll : vsen2 low limit low byte 7.2.62 vsen3 high limit low byte register location : index 43h type : read/write power on default value : ffh bit 7 6 5 4 3 2 1 0 name vsen3_hl[7:0] func. vsen3_hl : vsen3 high limit low byte 7.2.63 vsen3 low limit low byte register location : index 44h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name vsen3_ll[7:0] func. vsen3_ll : vsen3 low limit low byt e 7.2.64 vcc high limit low byte register location : index 45h type : read /write power on default value : ffh bit 7 6 5 4 3 2 1 0 name vcc_hl[7:0] func. vcc_hl : vcc high limit low byte
NCT7802Y feb, 2012 - 38 - version: 1.2 7.2.65 vcc low limit low byte register location : index 46h type : read /write po wer on default value : 00h bit 7 6 5 4 3 2 1 0 name vcc_ll[7:0] func. vcc_ll : vcc low limit low byte 7.2.66 vsen limit high byte 1 register location : index 47h type : read /write power on default value : cch bit 7 6 5 4 3 2 1 0 name vsen1_hl[9:8] vsen1_ll[9: 8] vsen2_hl[9:8] vsen2_ll[9:8] func. vsen1_hl[9:8] : vsen1 high limit high byte vsen1_ll[9:8] : vsen1 low limit high byte vsen2_hl[9:8] : vsen2 high limit high byte vsen2_ll[9:8] : vsen2 low limit high byte 7.2.67 vsen limit high byte 2 register location : inde x 48h type : read /write power on default value : cch bit 7 6 5 4 3 2 1 0 name vsen 3 _hl[9:8] vsen 3 _ll[9:8] v cc _hl[9:8] v cc _ll[9:8] func. vsen 3 _hl[9:8] : vsen 3 high limit high byte vsen 3 _ll[9:8] : vsen 3 low limit high byte v cc _hl[9:8] : v cc high limit high byte v cc _ll[9:8] : v cc low limit high byte 7.2.68 fanin1 limit low byte register location : index 49h type : read /write power on default value : ffh bit 7 6 5 4 3 2 1 0 name fanin1_hl[7:0] func. fanin1_hl[7:0] : fanin1 limit low byte
NCT7802Y feb, 2012 - 39 - version: 1.2 7.2.69 fanin2 limit low byte r egister location : index 4ah type : read /write power on default value : ffh bit 7 6 5 4 3 2 1 0 name fanin2_hl[7:0] func. fanin2_hl[7:0] : fanin2 limit low byte 7.2.70 fanin3 limit low byte register location : index 4bh type : read /write power on default value : ffh bit 7 6 5 4 3 2 1 0 name fanin3_hl[7:0] func. fanin3_hl[7:0] : fanin3 limit low byte 7.2.71 fanin1 limit high byte register location : index 4ch type : read /write power on default value : f8 h bit 7 6 5 4 3 2 1 0 name fanin1_hl[12:8] rsv func. fanin1_h l[12:8] : fanin1 limit high byte 7.2.72 fanin2 limit high byte register location : index 4dh type : read /write power on default value : f8h bit 7 6 5 4 3 2 1 0 name fanin2_hl[12:8] rsv func. fanin2_hl[12:8] : fanin2 limit high byte
NCT7802Y feb, 2012 - 40 - version: 1.2 7.2.73 fanin3 limit high byte reg ister location : index 4eh type : read /write power on default value : f8h bit 7 6 5 4 3 2 1 0 name fanin3_hl[12:8] rsv func. fanin3_hl[12:8] : fanin3 limit high byte 7.2.74 alert mask register register location : index 4fh type : read /write power on default va lue : 7fh bit 7 6 5 4 3 2 1 0 name rsv msk_tc msk_gp io msk_ta rt msk_fc msk_ah msk_al msk_df func. msk_tc : 1 indicates the alert# f rom t_crit event will be masked msk_gpio : 1 indicates the alert# from gpio event will be masked msk_tart : 1 indicates the alert# from tart event w ill be masked msk_fc : 1 indicates the alert # from fan event will be masked msk_ah : 1 indicates the alert# from high alert event will be masked msk_al : 1 indicates the alert# from low alert event will be maske d msk_df : 1 indicat es the alert# from d iode fault event will be masked 7.2.75 alert/smi mask temperature channel register location : index 50h type : read /write power on default value : 3fh bit 7 6 5 4 3 2 1 0 name rsv msk_pe ci1 msk_pe ci0 msk_lt d msk_rt d3 msk_rt d2 msk_rt d1 func . msk_peci1 : 1 indicates the alert#/smi from peci1 event will be masked msk_peci0 : 1 indicates the alert#/smi from peci0 event will be masked msk_ltd : 1 indicates the alert#/sm i from ltd event will be masked msk_rtd3 : 1 indicates the alert#/smi from rt d3 event will be masked msk_rtd2 : 1 indicates the alert#/smi from rtd2 event will be masked msk_rtd1 : 1 indicates the alert#/smi from rtd1 event will be masked
NCT7802Y feb, 2012 - 41 - version: 1.2 7.2.76 alert/smi mask fan channel register location : index 51h type : read /write power on defaul t value : 07h bit 7 6 5 4 3 2 1 0 name rsv msk_fa n3 msk_fa n2 msk_fa n1 func. msk_fan3 : 1 indicates the alert#/smi from fan3 /tart3 event will be masked msk_fan2 : 1 indicates the alert#/smi from fan2 /tart2 event will be masked msk_fan1 : 1 indicates the a lert#/smi from fan1 /tart1 event will be masked 7.2.77 smi mask voltage channel register location : index 52h type : read /write power on default value : 8fh bit 7 6 5 4 3 2 1 0 name msk_re set rsv msk_vc c msk_vs en3 msk_vs en2 msk_vs en1 func. msk_ reset : 1 indica tes the reset # (pin 6)output will be masked msk_ vcc : 1 indicates the smi from vcc event will be masked msk_ vsen3 : 1 indicates the smi from vsen3 event will be masked msk_vsen2 : 1 indicates the smi from vsen2 event will be masked msk_vsen1 : 1 indica tes the smi from vsen1 event will be masked 7.2.78 t_crit# mask register location : index 5 3 h type : read /write power on default value : b fh bit 7 6 5 4 3 2 1 0 name msk_ al l rsv msk_pe ci1 msk_pe ci0 msk_ lt d 4 msk_ rt d 3 msk_ rt d 2 msk_ rt d 1 func. msk_ all : 1 indica tes the t_crit# from all event will be masked msk_ peci1 : 1 indicates the t_crit# from peci1 event will be masked msk_ peci0 : 1 indicates the t_crit# from peci0 event will be masked msk_ ltd : 1 indicates the t_crit# from ltd event will be masked msk_ rt d 3 : 1 indicates the t_crit# from rtd3 event will be masked msk_rtd2 : 1 indicates the t_crit# from rtd2 event will be masked msk_rtd1 : 1 indicates the t_crit# from rtd1 event will be masked
NCT7802Y feb, 2012 - 42 - version: 1.2 7.2.79 gpio alert mask register location : index 54h type : read / write power on default value : 3fh bit 7 6 5 4 3 2 1 0 name rsv msk_gp io6 msk_gp io5 msk_gp io4 msk_gp io3 msk_gp io2 msk_gp io1 func. msk_ gpio6 : 1 indicates the alert# from gpio6 event will be masked msk_ gpio5 : 1 indicates the alert# from gpio5 event will be masked msk_ gpio4 : 1 indicates the alert# from gpio4 event will be masked msk_ gpio 3 : 1 indicates the alert# from gpio 3 event will be masked msk_ gpio 2 : 1 indicates the alert# from gpio 2 event will be masked msk_ gpio 1 : 1 indicates the alert# from gpio 1 event will be masked 7.2.80 gpio enable register location : index 55h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv engpio6 engpio5 engpio4 engpio3 engpio2 engpio1 func. engpio6 : 1 indicates the gpio6 enabled engpio5 : 1 indicates the gpio5 enabled engpio4 : 1 indicates the gpio4 enabled engpio3 : 1 indicates the gpio3 enabled engpio2 : 1 indicates the gpio2 enabled engpio1 : 1 indicates the gpio1 enabled 7.2.81 gpio mode register location : index 5 6 h type : read /write power on default value : 3f h bit 7 6 5 4 3 2 1 0 name rsv gpio6 mode gpio5 mode gpio4 mode gpio3 mode gpio2 mode gpio1 mode func. gpio6 mode : 0= input , 1= output gpio5 mode : 0= input , 1= output gpio4 mode : 0= input , 1= out put gpio3 mode : 0= input , 1= out put gpio2 mode : 0= input , 1= output gpio1 mode : 0= input , 1= output
NCT7802Y feb, 2012 - 43 - version: 1.2 7.2.82 gpio output type register location : index 5 7 h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv gpio6 ob gpio5 ob gpio4 ob gpio3 ob gpio2 ob gpio1 ob fun c. gpio6 output type : 0= push pull , 1= open drain gpio5 output type : 0= push pull , 1= open drain gpio4 output type : 0= push pull , 1= open drain gpio3 output type : 0= push pull , 1= open drain gpio2 output type : 0= push pull , 1= open drain gpio1 ou tput type : 0= push pull , 1= open drain 7.2.83 gpio input data register location : index 58h type : read only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv gpio6 in gpio5 in gpio4 in gpio3 in gpio2 in gpio1 in func. gpio6 in : input data register of gpio6 gpio5 in : input data register of gpio5 gpio4 in : input data register of gpio4 gpio3 in : input data register of gpio3 gpio2 in : input data register of gpio2 gpio1 in : input data register of g pio1 7.2.84 gpio output data register location : index 5 9h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv gpio6 out gpio5 out gpio4 out gpio3 out gpio2 out gpio1 out func. gpio6 out : output data register of gpio6 gpio5 out : output data register of gpio5 gpio4 out : output data r egister of gpio4 gpio3 out : output data register of gpio3 gpio2 out : output data register of gpio2 gpio1 out : output data register of gpio1
NCT7802Y feb, 2012 - 44 - version: 1.2 7.2.85 beep voltage channel enable register location : index 5ah type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv enbp_r eset enbp_v cc enbp_v sen3 enbp_v sen2 enbp_v sen1 func. enbp_reset : 1 indicates the beep is enabled for reset event enbp_vcc : 1 indicates the beep is enabled for vcc event enbp_vsen3 : 1 indicates the b eep is enabled for vsen3 event enbp_vsen2 : 1 indicates the beep is enabled for vsen2 event enbp_vsen1 : 1 indicates the beep is enabled for vsen1 event 7.2.86 beep fan channel enable register location : index 5bh type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv enbp_fan3 enbp_fan2 enbp_fan1 func. enbp_fan3 : 1 indicates the beep is enabled for fan3 event enbp_fan2 : 1 indicates the beep is enabled for fan2 event enbp_fan1 : 1 indicates the beep is enabled for fan1 event 7.2.87 beep temperature channel enable regis ter location : index 5ch type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv enbp_p eci1 enbp_p eci0 enbp_l td enbp_r td3 enbp_r td2 enbp_r td1 func. enbp_ peci1 : 1 indicates the beep is enabled for peci1 event enbp_ peci0 : 1 indicates the beep is enabled for peci0 event enbp_ltd : 1 indicates th e beep is enabled for ltd event enbp_ rtd3 : 1 indicates the beep is enabled for rtd3 event enbp_rtd2 : 1 indicates the b eep is enabled for rtd2 event enbp_rtd1 : 1 indicates the beep is enabled f or rtd1 event
NCT7802Y feb, 2012 - 45 - version: 1.2 7.2.88 b eep enable register location : index 5 d h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv enbp_smi enbp_df enbp_al enbp_ah enbp_tc enbp_en func. enbp_ smi : 1 indicates the beep is enabled for smi # event enbp_ d f : 1 indicates the beep is enabled for diode fault event enbp_ al : 1 indicates the beep is enabled for low alert event enbp_ ah : 1 indicates the beep is enabled for high alert event enbp_ tc : 1 indicates the beep is enabled for t _ crit # event enbp_ en : 1 i ndicates the beep is enabled 7.2.89 fan control output type location : index 5eh type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv endcfan2 endcfan1 func. endcfan2 : 0 indicates the fanctl2 output is pwm type 1 indicate s the fanctl2 o utput is dc type endcfan1 : 0 indicates the fanctl1 output is pwm type 1 indicate s the fanctl1 output is dc type 7.2.90 fan control output mode location : index 5fh type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv pwm3_p ol pwm2_p ol pw m1_p ol rsv pwm3_o d pwm2_o d pwm1_o d func. pwm3_pol : 1 indicates the fanctl3 pwm output is inverted pwm2_pol : 1 indicates the fanctl2 pwm output is inverted pwm1_pol : 1 indicates the fanctl1 pwm output is inverted pwm3_od : 0 indicates the fanctl3 pwm ou tput is push pull 1 indicates the f anctl3 pwm output is open drain pwm2_od : 0 indicates the fanctl2 pwm output is push pull 1 indicates the fanctl2 pwm output is o pen drain pwm1_od : 0 indicates the fanctl1 pwm output is push pull 1 indicates the f anctl1 pwm output is open drain
NCT7802Y feb, 2012 - 46 - version: 1.2 7.2.91 fan control 1 output value location : index 60h type : read /write for manual mode , read only for s mart f an tm i v control power on default value : 7f hex. bit 7 6 5 4 3 2 1 0 name fanduty1 func. fanduty1 : fanctl1 output value 7.2.92 fa n control 2 output value location : index 61h type : read /write for manual mode , read only for s mart f an tm i v control power on default value : 7f hex. bit 7 6 5 4 3 2 1 0 name fanduty2 func. fanduty2 : fanctl2 output value 7.2.93 fan control 3 output value loc ation : index 62h type : read /write for manual mode , read only for s mart f an tm i v control power on default value : 7f hex. bit 7 6 5 4 3 2 1 0 name fanduty3 func. fanduty3 : fanctl3 output value 7.2.94 close - loop fan control rpm mode register and configure reg ister of peci error (crpe ) location : index 63h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name twodimension rpm_high_en pecierr func. twodimension : close_loop fan control enable bit7 : 1 indicated the fan3 group enables close - lo op fan control rpm mode bit6 : 1 indicated the fan2 group enables close - loop fan control rpm mode bit5 : 1 indicated the fan1 group enables close - loop fan control rpm mode rpm_high_en : changing default unit of all rpm setting from 50 rpms to 100 rpms. i t benefit s to control ultra high rpm fan bit4 : 1 indicated the fan3 group support ultra high rpm fan bit3 : 1 indicated the fan2 group support ultra high rpm fan bit2 : 1 indicated the fan1 group support ultra high rpm fan pecierr : refer t he table 7 - 1 pe ci error condition table to f an output value
NCT7802Y feb, 2012 - 47 - version: 1.2 table 7 - 1 peci error condition table bit [1 - 0] peci error condition 00 bin fan output v alue keeps at its current value 01 bin fan output value will be set to fomv (fan ou tput min value when peci error) 1x bin fan output value will be se t to the full speed value (ffh) 7.2.95 temperature to fan mapping relationships register location : index 64h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv t emp2fanselect rsv temp1fanselect func. temp2fanselect , temp1fanselect : enable fanctl 3 C fanctl1 s mart f an tm i v 0 = fanctl has no relation with this temperature source. fanc tl is controlled by manual mode (default) 1 = applies s mart f an tm i v control for s mart f an tm iv on fanctl and this temperature 7.2.96 temperature to fan mapping relationships register location : index 6 5 h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv temp3fanselect func. temp3fanselect : enable fanctl 3 C fanc tl1 s mart f an tm i v 0 = fanctl has no relation with this temperature source. fanct l is controlled by manual mode (default) 1 = applies s mart f an tm i v control for s mart f an tm iv on fanctl and this temperature
NCT7802Y feb, 2012 - 48 - version: 1.2 7.2.97 fan control configuration register 1 location : index 66h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name temp2_sh are_en temp2_share_sel temp1_sh are_en temp1_share_sel func. temp2_share_en : enable temperature 2 sharing table function temp2_share_sel : select which temperature 2 source could share control table in s mart f an tm iv temp1_share_en : enable temperature 1 sharing table function temp1_share_sel : select which temperature1 source could share control table in s mart f an tm iv refer to th e table 7 - 2 s haring t able table 7 - 2 s haring t able bit [ 2 - 0] share_sel condition 00 0 bin remote 1 temperature will be referred 00 1 bin remote 2 temperature will be referred 0 10 bin remote 3 temperature will be referred 0 11 bin local temperature will be referred 1 0 0 bin peci agent 0 temperature will be referred 10 1 bin peci agent 1 temperature will be referred 110 bin programmable temperature 1 will be referred 1 11 bin programmable temperature 2 will be referred 7.2.98 fan control configuration registe r 2 location : index 67h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv temp3_share_en temp3_share_sel func. temp3_share_en : enable temperature 3 sharing table function temp3_share_sel : select which temperature3 source could share control table in s mart f an tm iv refer to th e table 7 - 2 sharing table
NCT7802Y feb, 2012 - 49 - version: 1.2 7.2.99 fan control configuration register 3 location : index 68h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv temp2_source_sel rsv temp1_source_sel fun c. temp2_source_sel : temperature 2 source selection temp1_source_sel : temperature 1 source selection refer to th e table 7 - 3 s ource table table 7 - 3 source table bit [ 2 - 0] source _sel condition 00 0 bin remote 1 temperature will be referred 00 1 bin remote 2 temperature will be referred 0 10 bin remote 3 temperature will be referred 0 11 bin local temperature will be referred 1 0 0 bin peci agen t 0 temperature will be referre d 10 1 bin peci agent 1 temperature will b e referred 110 bin programmable temperature 1 will be referred 1 11 bin programmable temperature 2 will be referred 7.2.100 fan control configuration register 4 location : index 69h type : read/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv temp 3_source_sel func. temp3_source_sel : temperature 3 source selection refer to th e table 7 - 3 s ource table 7.2.101 close - loop fan control rpm mode tolerance register location : index 6dh type : read/write power on default value : 0 0 h bit 7 6 5 4 3 2 1 0 name rsv generic_tol_rpm func. generic_tol_rpm : tolerance of rpm mode, unit 50 rpm
NCT7802Y feb, 2012 - 50 - version: 1.2 7.2.102 fanctl step up time register location : index 6eh type : read /write power on default value : 0ah bit 7 6 5 4 3 2 1 0 name uptime func. uptime : in s mart f an tm iv mode, t his r egister determines the amount of time fanout takes to increase its value by one step the units are intervals of 0.1 second. the default time is 1 second 7.2.103 fanctl step down time register location : index 6fh type : read/write power on default value : 0ah bi t 7 6 5 4 3 2 1 0 name downtime func. downtime : in s mart f an tm iv mode, t his register determines the amount of time fanout takes to decrease its value by one st ep the units are intervals of 0.1 second. the default time is 1 second 7.2.104 default fan speed re gister location : index 70h type : read /write power on default value : 7fh bit 7 6 5 4 3 2 1 0 name defaultfanspeed func. defaultfanspeed : default fan speed at power - on 7.2.105 fanctl1 pwm prescalar register location : index 71h type : read /write power on def ault value : 84h bit 7 6 5 4 3 2 1 0 name clksel divisor[6:0] func. cksel : clock source select divisor : clock frequency divisor refer the table 7 - 4 divisor table a & table 7 - 5 divisor table b
NCT7802Y feb, 2012 - 51 - version: 1.2 the clock source selected by cksel will be divided by the d ivisor and used as a fan pwm output frequency. if cksel equals 1 , then the output clock is simply equal to 125 / (divisor [6:0] +1) khz mappeddivisor depends on divisor [ 6 :0] and is described in the table below. table 7 - 4 divisor table a (cksel=1) divisor[ 6 :0] mapped divisor output frequency divisor[ 6 :0] mapped divisor output frequency 0 0000 00 1 125k hz rsv 000 00 01 2 62.5k hz 000 0010 3 41.6k hz 000 0011 4 31.2k hz 000 0100 5 25k hz 0001111 16 7.8k hz 000 01 01 6 20.8k hz 0011111 32 3.9k hz 000 0110 7 17.8k hz 0111111 64 1.9k hz 000 0111 8 15.6k hz 111 1111 128 976 hz if cksel equals 0 , then the output clock is simply equal to 1000 / mapped divisor hz mappeddivisor depends on divisor [3:0] and is described in the ta ble below. table 7 - 5 divisor table b (cksel=0) divisor[3:0] mapped divisor output frequency divisor[3:0] mapped divisor output frequency 0000 1 1000 hz 1000 12 83 hz 0001 2 500 hz 1001 16 62.5 hz 0010 3 333 hz 1010 32 31.25 hz 0011 4 250 hz 1011 64 15.6 hz 0100 5 200 hz 1100 128 7.8 hz 0101 6 166 hz 1101 256 3.9 hz 0110 7 142 hz 1110 512 1.9 hz 0111 8 1 25 hz 1111 1024 0.97 hz 7.2.106 fanctl2 pwm prescalar register location : index 72h type : read/write power on default valu e : 84h bit 7 6 5 4 3 2 1 0 name clksel divisor[6:0]
NCT7802Y feb, 2012 - 52 - version: 1.2 func. cksel : clock source select divisor : clock fr equency divisor refer the table 7 - 4 divisor table a & table 7 - 5 divisor table b 7.2.107 fanctl3 pwm prescalar register location : index 7 3 h type : read/wri te power on default value : 84h bit 7 6 5 4 3 2 1 0 name clksel divisor[6:0] func. cksel : clock source select divisor : clock frequency divi sor refer the table 7 - 4 divisor table a & table 7 - 5 divisor table b 7.2.108 temp1 hystersis registe r location : index 74h type : read/write power on default value : 53h bit 7 6 5 4 3 2 1 0 name rsv criti_hyst1 rsv oper_hyst1 func. criti_hyst1 : hystersis value of s mart f an tm i v critical temperature oper_hyst1 : hystersis value of s mart f an tm i v operating temperature 7.2.109 t emp2 hystersis register location : index 75h type : read/write power on default value : 53h bit 7 6 5 4 3 2 1 0 name rsv criti_hyst2 rsv oper_hyst2 func. criti_hyst2 : hystersis value of s mart f an tm i v critical temperature oper_hyst2 : hystersis value of s mart f an tm i v operating temperature 7.2.110 temp3 hystersis register location : index 76h type : read /write power on default value : 53h bit 7 6 5 4 3 2 1 0 name rsv criti_hyst3 rsv oper_hyst3 func. criti_hyst3 : hystersis value of s mart f an tm i v critical te mperature oper_hyst3 : hystersis value of s mart f an tm i v operating temperature
NCT7802Y feb, 2012 - 53 - version: 1.2 7.2.111 fanctl start duty cycle register location : index 77h type : read /write power on default value : 30h bit 7 6 5 4 3 2 1 0 name startdutycycle func. startdutycycle : control th e fanctl1 - fanctl 3 fan output start - up value 7.2.112 fanctl stop time register location : index 78h type : read /write power on default value : ff h bit 7 6 5 4 3 2 1 0 name stoptime func. stoptime : control the fanctl1 - fanctl 3 f an stop time unit in 0.1sec. range s from 0.1sec to 25.5 sec if set to 0, the fan will never stop 7.2.113 nonstop dis able register location : index 79h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv nonstop_fan3 nonstop_fan2 nonstop_fan1 func. nonstop_fan3 : 1 indic ates the fan3 nonstop function dis abled nonstop_fan2 : 1 indicates the fan2 nonstop function dis abled nonstop_fan1 : 1 indicates the fan1 nonstop function dis abled 7.2.114 fan output min value when peci error register (fomv ) location : index 7 a h type : read /w rite power on default value : 8 0 h bit 7 6 5 4 3 2 1 0 name min duty_pecierr func. min duty_pecierr : control the fanctl1 - fanctl 3 fan output min value when peci error condition is occurred . also see crpe (configure register of peci error)
NCT7802Y feb, 2012 - 54 - version: 1.2 7.2.115 t able 1 x - axis t ransition point 1 register location : index 80h type : read /write power on default value : 19 h bit 7 6 5 4 3 2 1 0 name temp1table_tr1 func. temp1table_tr1 : temperature point 1 of s mart f an tm i v table 1 7.2.116 table 1 x - axis transition point 2 register locat ion : index 8 1 h type : read /write power on default value : 23 h bit 7 6 5 4 3 2 1 0 name temp1table_tr2 func. temp1table_tr2 : temperature point 2 of s mart f an tm i v table 1 7.2.117 table 1 x - axis transition point 3 register location : index 8 2 h type : read /writ e power on default value : 2d h bit 7 6 5 4 3 2 1 0 name temp1table_tr3 func. temp1table_tr3 : temperature point 3 of s mart f an tm i v table 1 7.2.118 t able 1 x - axis transition point 4 register location : index 8 3 h type : read /write power on default value : 37 h b it 7 6 5 4 3 2 1 0 name temp1table_tr4 func. temp1table_tr4 : temperature point 4 of s mart f an tm i v table 1
NCT7802Y feb, 2012 - 55 - version: 1.2 7.2.119 table 1 x - axis critical point register location : index 8 4 h type : read /write power on default value : 3c h bit 7 6 5 4 3 2 1 0 name temp1tabl e_trcritical func. temp1table_trcritical : critical temperature point of s mart f an tm i v table 1 7.2.120 table 1 y - axis transition point 1 register location : index 85h type : read /write power on default value : 8c h bit 7 6 5 4 3 2 1 0 name temp1table_fl1 func . temp1table_fl1 : fanctl point 1 of s mart f an tm i v table 1 7.2.121 table 1 y - axis transition point 2 register location : index 86h type : read /write power on default value : aa h bit 7 6 5 4 3 2 1 0 name temp1table_fl2 func. temp1table_fl2 : fanctl point 2 of s mart f an tm i v table 1 7.2.122 table 1 y - axis transition point 3 register location : index 87h type : read /write power on default value : c8 h bit 7 6 5 4 3 2 1 0 name temp1table_fl3 func. temp1table_fl3 : fanctl point 3 of s mart f an tm i v table 1
NCT7802Y feb, 2012 - 56 - version: 1.2 7.2.123 table 1 y - axis transition point 4 register location : index 88h type : read /write power on default value : e6 h bit 7 6 5 4 3 2 1 0 name temp1table_fl4 func. temp1table_fl4 : fanctl point 4 of s mart f an tm i v table 1 7.2.124 t able 2 x - axis transition point 1 register lo cation : index 90h type : read /write power on default value : 19 h bit 7 6 5 4 3 2 1 0 name temp2table_tr1 func. temp2table_tr1 : temperature point 1 of s mart f an tm i v table 2 7.2.125 table 2 x - axis transition point 2 register location : index 91h type : read /w rite power on default value : 23 h bit 7 6 5 4 3 2 1 0 name temp2table_tr2 func. temp2table_tr2 : temperature point 2 of s mart f an tm i v table 2 7.2.126 table 2 x - axis transition point 3 register location : index 92h type : read /write power on default value : 2 d h bit 7 6 5 4 3 2 1 0 name temp2table_tr3 func. temp2table_tr3 : temperature point 3 of s mart f an tm i v table 2
NCT7802Y feb, 2012 - 57 - version: 1.2 7.2.127 table 2 x - axis transition point 4 register location : index 93h type : read /write power on default value : 37 h bit 7 6 5 4 3 2 1 0 name temp2table_tr4 func. temp2table_tr4 : temperature point 4 of s mart f an tm i v table 2 7.2.128 table 2 x - axis critical point register location : index 94h type : read /write power on default value : 3c h bit 7 6 5 4 3 2 1 0 name temp2table_trcritical func. temp2t able_trcritical : critical temperature point of s mart f an tm i v table 2 7.2.129 table 2 y - axis transition point 1 register location : index 95h type : read /write power on default value : 8c h bit 7 6 5 4 3 2 1 0 name temp2table_fl1 func. temp2table_fl1 : fanctl point 1 of s mart f an tm i v table 2 7.2.130 table 2 y - axis transition point 2 register location : index 9 6h type : read /write power on default value : aa h bit 7 6 5 4 3 2 1 0 name temp 2 table_fl2 func. temp 2 table_fl2 : fanctl point 2 of s mart f an tm i v table 2
NCT7802Y feb, 2012 - 58 - version: 1.2 7.2.131 table 2 y - axis transition point 3 register location : index 9 7h type : read /write power on default value : c8 h bit 7 6 5 4 3 2 1 0 name temp 2 table_fl3 func. temp 2 table_fl3 : fanctl point 3 of s mart f an tm i v table 2 7.2.132 table 2 y - axis transition point 4 register location : index 9 8h type : read /write power on default value : e6 h bit 7 6 5 4 3 2 1 0 name temp 2 table_fl4 func. temp 2 table_fl4 : fanctl point 4 of s mart f an tm i v table 2 7.2.133 table 3 x - axis transition point 1 register location : index a0h type : read /write power on default value : 19 h bit 7 6 5 4 3 2 1 0 name temp3table_tr1 func. temp3table_tr1 : temperature point 1 of s mart f an tm i v table 3 7.2.134 table 3 x - axis transition point 2 register location : index a 1h type : read /write power on default v alue : 23 h bit 7 6 5 4 3 2 1 0 name temp 3 table_tr2 func. temp 3 table_tr2 : temperature point 2 of s mart f an tm i v table 3
NCT7802Y feb, 2012 - 59 - version: 1.2 7.2.135 table 3 x - axis transition point 3 register location : index a 2h type : read /write power on default value : 2d h bit 7 6 5 4 3 2 1 0 name temp 3 table_tr3 func. temp 3 table_tr3 : temperature point 3 of s mart f an tm i v table 3 7.2.136 table 3 x - axis transition point 4 register location : index a 3h type : read /write power on default value : 37 h bit 7 6 5 4 3 2 1 0 name temp 3 table_tr4 func. temp 3 table_tr4 : temperature point 4 of s mart f an tm i v table 3 7.2.137 table 3 x - axis critical point register location : index a 4h type : read /write power on default value : 3c h bit 7 6 5 4 3 2 1 0 name temp 3 table_trcritical func. temp 3 table_trcritical : crit ical temperature point of s mart f an tm i v table 3 7.2.138 table 3 y - axis transition point 1 register location : index a 5h type : read /write power on default value : 8c h bit 7 6 5 4 3 2 1 0 name temp 3 table_fl1 func. temp 3 table_fl1 : fanctl point 1 of s mart f an t m i v table 3
NCT7802Y feb, 2012 - 60 - version: 1.2 7.2.139 table 3 y - axis transition point 2 register location : index a 6h type : read /write power on default value : aa h bit 7 6 5 4 3 2 1 0 name temp 3 table_fl2 func. temp 3 table_fl2 : fanctl point 2 of s mart f an tm i v table 3 7.2.140 table 3 y - axis tra nsition point 3 register location : index a 7h type : read /write power on default value : c8 h bit 7 6 5 4 3 2 1 0 name temp 3 table_fl3 func. temp 3 table_fl3 : fanctl point 3 of s mart f an tm i v table 3 7.2.141 table 3 y - axis transition point 4 register location : i ndex a 8h type : read /write power on default value : e6 h bit 7 6 5 4 3 2 1 0 name temp 3 table_fl4 func. temp 3 table_fl4 : fanctl point 4 of s mart f an tm i v table 3 7.2.142 td1 offset register location : index c1 h type : read /write power on default value : 3d h bit 7 6 5 4 3 2 1 0 name rsv offset_td1 func. offset_td1 : td1 function offset register
NCT7802Y feb, 2012 - 61 - version: 1.2 7.2.143 td2 offset register location : index c2h type : read /write power on default value : 3d h bit 7 6 5 4 3 2 1 0 name rsv offset_td2 func. offset_td2 : td2 function of fset register 7.2.144 tr1 offset register location : index c4h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv offset_tr1 func. offset_tr1 : tr1 function offset register 7.2.145 tr2 offset register location : index c5h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv offset_tr2 func. offset_tr2 : tr2 function offset register 7.2.146 tr3 offset register location : index c6h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv offset_tr3 fun c. offset_tr3 : tr3 function offset register
NCT7802Y feb, 2012 - 62 - version: 1.2 7.2.147 digital filter level select register location : index c b h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name ldt rt3 rt2 rt1 func. 00 : no filter selected. (default) 01: filter level 1 selected. 10: filter level 2 selected. 11: filter level 3 selected. higher level will slow down the temperature sensor response. 7.2.148 programmable temperature 1 register location : index e3h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name pgm_temp1[7:0] func. pgm_temp1[7:0] : programmable temperature 1 7.2.149 programmable temperature 2 register location : index e4h type : read /write power on default value : 00h bit 7 6 5 4 3 2 1 0 name pgm_temp2[7:0] func. pgm_temp2[7:0] : programmable temperature 2 7.2.150 soft ware reset register location : index fch type : write only bit 7 6 5 4 3 2 1 0 name init rsv func. init : write 1 to reset the NCT7802Y
NCT7802Y feb, 2012 - 63 - version: 1.2 7.2.151 vendor id register location : index fdh type : ready only power on default value : 50h bit 7 6 5 4 3 2 1 0 name vendorid func. vendorid : vendor id of NCT7802Y 7.2.152 chip id register location : index feh type : ready only power on default value : c3h bit 7 6 5 4 3 2 1 0 name chipid func. chipid : chip id of NCT7802Y 7.2.153 version id register location : in dex ffh type : ready only power on default value : 2 x h bit 7 6 5 4 3 2 1 0 name versionid func. versionid : versin id of NCT7802Y, the value is 2xh (x=0,1,2)
NCT7802Y feb, 2012 - 64 - version: 1.2 7.3 bank 1 register map idx register name att df 7 6 5 4 3 2 1 0 0 bank select r/w 00 rsv bksel 1 peci control reg - 1 rw 10 peci_en rsv manual_e n routine_en 2 peci control reg - 2 rw 00 rsv tn_extend[1:0] rsv 3 peci control reg - 3 rw 00 rsv en_agt[1:0] rsv dmn1_agt[3:0] 4 report temp style 1 rw 00 rsv clamp rsv rtdmn_agt[1:0] rthigher 5 address cont ent for manual command rw 00 addr 6 write length for manual command rw 00 write_length 7 read length for manual command rw 00 read_length 8 command code for manual command rw 00 command_code 9 agent0 base temperature rw 00 rsv tbase0[6:0] 0a agent1 ba se temperature rw 00 rsv tbase1[6:0] 0b generic write in data 1 to client rw 00 wrdata_1 0c generic write in data 2 to client rw 00 wrdata_2 0d generic write in data 3 to client rw 00 wrdata_3 0e generic write in data 4 to client rw 00 wrdata_4 0f gen eric write in data 5 to client rw 00 wrdata_5 10 generic write in data 6 to client rw 00 wrdata_6 11 generic write in data 7 to client rw 00 wrdata_7 12 generic write in data 8 to client rw 00 wrdata_8 13 generic write in data 9 to client rw 00 wrdata_ 9 14 generic write in data 10 to client rw 00 wrdata_10 15 generic write in data 11 to client rw 00 wrdata_11 16 generic write in data 12 to client rw 00 wrdata_12 17 agt0_d0 relative temp (hb) ro f8 rth_agt0_d0 18 agt0_d0 relative temp (lb) ro 80 rtl _agt0_d0 19 agt0_d1 relative temp (hb) ro f8 rth_agt0_d1 1a agt0_d1 relative temp (lb) ro 80 rtl_agt0_d1 1b agt1_d0 relative temp (hb) ro f8 rth_agt1_d0 1c agt1_d0 relative temp (lb) ro 80 rtl_agt1_d0 1d agt1_d1 relative temp (hb) ro f8 rth_agt1_d1 1 e agt1_d1 relative temp (lb) ro 80 rtl_agt1_d1
NCT7802Y feb, 2012 - 65 - version: 1.2 idx register name att df 7 6 5 4 3 2 1 0 1f agent characteristic ro 00 rsv alive_agt[1:0] 2a generic read out data 1 from client ro 00 rddata_1 2b generic read out data 2 from client ro 00 rddata_2 2c generic read out data 3 from client ro 00 rdd ata_3 2d generic read out data 4 from client ro 00 rddata_4 2e generic read out data 5 from client ro 00 rddata_5 2f generic read out data 6 from client ro 00 rddata_6 30 generic read out data 7 from client ro 00 rddata_7 31 generic read out data 8 fr om client ro 00 rddata_8 32 generic read out data 9 from client ro 00 rddata_9
NCT7802Y feb, 2012 - 66 - version: 1.2 7.4 b ank 1 register detail 7.4.1 peci control register 1 location : index 0 1 h type : rea d/write power on default value : 1 0h bit read / write description 7 r / w enable peci function ( peci_en ) 6 ~ 2 r / w reserved 1 r / w enable peci manual command function ( manual_en ) 0 r / w enable peci gettemp routine function ( routine_en ) 7.4.2 peci control register 2 location : index 02h type : rea d/write power on default value : 0 0 h bit read / write description 7 ~ 6 r / w reserve d 5 r / w tn_extend[1:0] adjust transaction rate 00 bin = 1.5 mhz 01 bin = 750 khz 10 bin = 375 khz 11 bin = 187.5 khz 4 r / w 3 ~ 0 r / w reserve d 7.4.3 p eci control register 3 location : index 03h type : rea d/write po wer on default value : 00h bit read / write description 7 ~ 6 r / w reserved 5 r / w en_agt[1:0] peci host to process related agents enable or disable agent peci host to process related agents enable or disable agent0 4 r / w 3 ~ 2 r / w reserved 1 r / w dmn1_agt[1:0] indicate which agen t with domain1
NCT7802Y feb, 2012 - 67 - version: 1.2 bit read / write description 0 r / w 0 = agent does not have domain 1 1 = agent has domain 1 (do not set to 1 , if the cpu does not exist domain 1) 7.4.4 report temperature style register location : index 04h type : rea d/write power o n default value : 00h bit read / write description 7 ~ 5 r / w reserved 4 r / w when temperature data reading is positive or less than - 128, can enable this function to clamp temperature data.( clamp ) 3 r / w reserved 2 r / w rtdmn_agt[1:0] agent 1 - ag ent 0 always return the relative doma in temperature 0 = agent always returns the rel ative temperature from domain 0 1 = agent always returns the rel ative temperature from domain 1 1 r / w 0 r / w return high temperature of doamin0 or domain1.( rthigher ) 0 = the temperature of each agent is returned from domain 0 or domain 1, which is controlled by (cr 04 hex ) 1 = return the highest temperature in domain 0 a nd domain 1 of individual agent 7.4.5 address content for manual command register location : index 05h typ e : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci command address default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.6 write length for manual command register location : index 06h type : rea d/write power on defa ult value : 00h bit 7 6 5 4 3 2 1 0 name peci command write length
NCT7802Y feb, 2012 - 68 - version: 1.2 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.7 read length for manual command register location : index 07h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci command read length default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.8 command code for manual command register location : index 08h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci c ommand code default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.9 agent0 base temperature register location : index 09h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name reserved tbase 0 default 0 0 0 0 0 0 0 0 de scription the data would be sent to client 7.4.10 agent1 base temperature register location : index 0ah type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name reserved tbase 1 default 0 0 0 0 0 0 0 0 description the data would be sent to clie nt
NCT7802Y feb, 2012 - 69 - version: 1.2 7.4.11 generic write in data 1 to client register location : index 0bh type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 1 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.12 generic write in data 2 to client register location : index 0ch type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 2 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.13 generic write in data 3 to client register location : index 0dh type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 3 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.14 generic write in data 4 to client register location : index 0eh type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 4 default 0 0 0 0 0 0 0 0 description the data would be sent to client
NCT7802Y feb, 2012 - 70 - version: 1.2 7.4.15 generic write in data 5 to client register location : index 0fh type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 5 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.16 generic write in data 6 to client register location : index 10h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name pe ci write data 6 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.17 generic write in data 7 to client register location : index 11h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 7 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.18 generic write in data 8 to client register location : index 12h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 8 default 0 0 0 0 0 0 0 0 description the data would be sent to client
NCT7802Y feb, 2012 - 71 - version: 1.2 7.4.19 generic write in data 9 to client register location : index 13h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 9 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.20 generic write in data 10 to client register location : index 14h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 10 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.21 generic write in data 11 to client register location : index 15h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 11 default 0 0 0 0 0 0 0 0 description the data would be sent to client 7.4.22 generic write in data 12 to client register location : index 16h type : rea d/write power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci write data 12 default 0 0 0 0 0 0 0 0 description the data would be sent to client
NCT7802Y feb, 2012 - 72 - version: 1.2 7.4.23 agent relative temperature register location : index 17h ~ 1eh type : rea d onl y power on default value : f880h these registers return the raw data retrieved from peci gettemp(). the data may be the error code (range: 8000h~81ffh) or relative temperatures to process the defined tbase . the error code will only be update in artr and ab solute temperature will not be updated when the error code is received. if the rthigher mechanism is activated, the normal temperature will always be returned first. in case both 2 domains return errors, the return priority will be overflow error > underfl ow error > missing diode > general error. the reset value is 8001 hex, in that peci is defaulted to be off. in peci, 8001 hex means the diode is missing. index 17 - 1e description 17h[15:8],18h[7:0] domain0 relative temperature agent0 [15:0] 19h[15:8],1ah [7:0] domain1 relative temperature agent0 [15:0] 1bh[15:8],1ch[7:0] domain0 relative temperature agent1 [15:0] 1dh[15:8],1eh[7:0] domain1 relative temperature agent1 [15:0] ge ttemp() peci temperature format bit description 15 sign bit. (sign) in peci protocol, this bit should always be 1 to represent a negative temperature. 14 - 6 the integer part of the relative temperature. ( temperature[8:0] ) 5 temp_2 . 0.5 unit. 4 temp_4 . 0.25 unit. 3 temp_8 . 0.125 unit. 2 temp_16 . 0.0625 unit. 1 temp_32 . 0.03125 unit. 0 temp_64 . 0.015625 unit. gettemp() response definition response meaning general sensor error (gse) thermal scan did not complete in time. retr y is appropriate. 0x0000 processor is running at its maximum temperature or is currently being reset. all other data valid temperature reading, reported as a negative offset from the tcc activation temperature. the valide temperature reading is referred to gettemp() peci temperature format
NCT7802Y feb, 2012 - 73 - version: 1.2 error code description host operation 8000 hex general sensor error no further processing. 8001 hex sensing device missing 8002 hex operational, but the temperature is lower than the sensor operation range. compulsor ily write 0 back to the temperature readouts. 8003 hex operational, but the temperature is higher than the sensor operation range. compulsorily write 127 back to the temperature readouts. 8004 hex ~ 81ff hex reserved no further operation. 7.4.24 agent character istic register location : index 1fh type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name rsv peci alive agent default 0 0 0 0 0 0 0 0 bit description 7~ 2 reserve d 1 1: agent1 is able to respond to ping() command. agent alive 0: agen t1 isn?t able to respond to ping() command. agent is not alive 0 1: agent0 is able to respond to ping() command. agent alive 0: agent0 isn?t able to respond to ping() command. agent is not alive 7.4.25 generic read out data 1 from client register location : ind ex 2ah type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 1 default 0 0 0 0 0 0 0 0 description the data would be g o t from client
NCT7802Y feb, 2012 - 74 - version: 1.2 7.4.26 generic read out data 2 from client register location : index 2bh type : rea d only po wer on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 2 default 0 0 0 0 0 0 0 0 description the data would be g o t from client 7.4.27 generic read out data 3 from client register location : index 2ch type : rea d only power on default value : 00h b it 7 6 5 4 3 2 1 0 name peci read data 3 default 0 0 0 0 0 0 0 0 description the data would be g o t from client 7.4.28 generic read out data 4 from client register location : index 2dh type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name pec i read data 4 default 0 0 0 0 0 0 0 0 description the data would be g o t from client 7.4.29 generic read out data 5 from client register location : index 2eh type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 5 default 0 0 0 0 0 0 0 0 description the data would be g o t from client
NCT7802Y feb, 2012 - 75 - version: 1.2 7.4.30 generic read out data 6 from client register location : index 2fh type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 6 default 0 0 0 0 0 0 0 0 description the data would be g o t from client 7.4.31 generic read out data 7 from client register location : index 30h type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 7 default 0 0 0 0 0 0 0 0 description the data would be g o t from clie nt 7.4.32 generic read out data 8 from client register location : index 31h type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 8 default 0 0 0 0 0 0 0 0 description the data would be g o t from client 7.4.33 generic read out data 9 from client register location : index 3 2 h type : rea d only power on default value : 00h bit 7 6 5 4 3 2 1 0 name peci read data 9 default 0 0 0 0 0 0 0 0 description the data would be g o t from client
NCT7802Y feb, 2012 - 76 - version: 1.2 8. electrical character istics 8.1 absolute maximum rating s parameter rating unit power supply voltage 3.3v ? 5 % v input voltage - 0. 3 to +3.6 v operating temperature - 4 0 to + 85 ? c storage temperature - 55 to +150 ? c note: exposure to conditions beyond those listed under absolute maximum ratings may adversel y affect the life and reliability of the device. 8.2 dc characteristics (ta = 0 ? c to 70 ? c, vdd = 3.3v ? 5 %, gnd = 0v) parameter sym. min. typ. max. unit conditions od 12 C open - drain output pin with source - sink capability of 12 ma , with 5v tolerance support. output low voltage v ol 0.4 v i ol = 12 ma out 12 - output buffer pin with source - sink capability of 12 ma , with 5v tolerance support. output low voltage v ol 0.4 v i ol = 12 ma output high voltage v oh 2.4 v i oh = - 12 ma in ts - ttl level schmitt - tr iggered input pin , with 5v tolerance support. input low voltage v il 0.8 v vdd = 3.3v input high voltage v ih 2.0 v vdd = 3.3v input high leakage i lih +10 ? a vin=3.3v input low leakage i lil - 10 ? a vin=0v v1 C bi - direction pin for intel tm peci i nput low voltage v il 0.275v tt 0.5v tt v input high voltage v ih 0.55v tt 0.725v tt v output low voltage v ol 0.25v tt v output high voltage v oh 0.75v tt v
NCT7802Y feb, 2012 - 77 - version: 1.2 8.3 ac characteristics smbus interface parameter symbol min. max. unit scl clock period t - sc l 2.5 us start condition hold time t hd;sda 1.5 us stop condition setup - up time t su;sto 1 us data to scl setup time t su;dat 1 2 0 ns data to scl hold time t hd;dat 5 ns scl and sda rise time t r 1.0 us scl and sda fall time t f 300 ns
NCT7802Y feb, 2012 - 78 - version: 1.2 9. ordering information part number package remarks NCT7802Y qfn20 green package (halogen - free) 10. top marking specific ations 1 st line : nuvoton logo 2 nd line : part number - NCT7802Y 3 rd line : assembly tracking code 1 1 3 : packages made i n year 2011, week 1 3 t : assembly house code a : ic version ba : nuvoton internal use code NCT7802Y 11 3 taba
NCT7802Y feb, 2012 - 79 - version: 1.2 11. package drawing and dimensions qfn20 4x4 mm 2 top view bottom view 11 6 20 1 5 10 15 16 16 15 11 10 6 5 1 20
NCT7802Y feb, 2012 - 80 - version: 1.2 12. revision history version date page description 1.0 07/13 /2011 n.a. public released, all versions before 1.0 are preliminary versions. 1.1 1/5/2012 2 added vcc monitoring accuracy item . 1.2 2/2/2012 7,16 added programming from eeprom description. important notice nuvoton products are neither intended nor warranted for usage in systems or equipm ent, any malfunction or failure of which may cause loss of human life, bodily injury or severe property damage. such applications are deemed , insecure usage. insecure usage includes, but is not limited to: equipment for surgical implementation, atomic e nergy control instruments, airplane or spaceship instruments, the control or operation of dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and other applications intended to support or su stain life. all insecure usage shall be made at customers risk, and in the event that third parties lay claims to nuvoton as a result of customers insecure usage, customer shall indemnify the damages and liabilities thus incurred by nuvoton.

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