n 5 51c321 - 1 - table of contents - 1. general description ................................ ................................ ................................ .......... 2 2. features ................................ ................................ ................................ ................................ . 2 3. block diagra m ................................ ................................ ................................ ...................... 3 4. pin description ................................ ................................ ................................ ..................... 3 5. absolute maximum rat ings ................................ ................................ .............................. 4 6. electr ical characteristics ................................ ................................ ........................... 4 7. application circuit ................................ ................................ ................................ ............. 6 7.1 w551c mode ................................ ................................ ................................ ..................... 6 7.2 spi mode ................................ ................................ ................................ ........................... 7 8. revision history ................................ ................................ ................................ .................. 7
n 5 51c321 - 2 - 1. general description the N551C321 is an 32mbit mask rom with interface with nuvoton powerspeech, banddirector and viewtal k series products to extend the memory size for long duration applications. 2. features ? wide range of operation voltage: 2.4 ~ 5.5v @ normal read mode ? rom size: 32mbit ? interface: w551c interface or spi rom interface by mask option ? normal read access time: 5 00 ns ? low power consumption ? operating current: ? 2.5 ma (max.) for spi mode ? 1.0ma (max.) for w551c mode ? available package form: ? cob is essential
n 5 51c321 - 3 - 3. block diagram 4. pin description 4.1.1 w551c interface pad symbol i/o function bs i memo ry bank selection 0: lower 16mbit; 1: higher 16mbit addr i clock input for shift - in the start address; the first rising edge signals will reset the address counter. clk i clock input for data read/write data1 i/o bi - directional data pin with intern al pull - high data2 i/o bi - directional data pin with internal pull - high for cascade data through cs i chip select pin, active - low chip enable. vss i microcontroller negative power supply ( - ). vdd i microcontroller positive power supply (+). 4.1.2 spi inter face pad symbol i/o function sdi i command/address input sdo o data output sclk i clock input clock generator vdd vss addr data2 / sdo output buffer bs address decoder clk/ sclk shift register / address counter data2 sdo data1 / sdi data1 sdi sim/ spi cs/ csb sim/ spi 16m bits rom 16m bits rom
n 5 51c321 - 4 - symbol i/o function csb i chip select input, low active. when csb is high, chip is in standby mode and sdo pin is at high impedance vss i microcontroller negative power supp ly ( - ). vdd i microcontroller positive power supply (+). 5. absolute maximum rat ings item symbol conditions rated value unit power supply v dd C v ss - - 0.3 ~ +7.0 v input voltage v in all inputs v ss - 0.3 ~ v dd +0.3 v storage temp. t stg - - 55 ~ +150 ? c ope rating temp. t opr - 0 ~ + 70 ? c note: operating the device under conditions beyond those indicated above may cause permanent damage or affect device reliability 6. electrical character istics dc parameters (vdd ? vss = 4 .5 v 10% , t a = 25 ? c; unless otherwise spec ified) parameter sym. conditions min. typ. max. unit operating v oltage v dd 2.4 5.5 v operat ion current iop 1 w551c interface mode, d ata output rate 1mhz 1 ma operation current iop2 spi interface mode, data output rate 2mhz 2.5 ma standby current i sb vdd=5.5v 4 ? il all input pins - 0.3 - 0.8 v input high voltage v ih all input pins 2.0 - vdd v pull - high resistor rph2 data1, data2 750 k ? ac parameters spi mode interface (vdd ? vss = 4 .5 v 10% , ta = 25 ? c; unless otherwise specified) parameter sym. conditions min. typ. max. unit serial clock period tsck data read 500 ns fast data read 250 ns
n 5 51c321 - 5 - select lead time tssb 100 ns data input setup time tsui 20 ns d ata input hold time thdi 20 ns data output valid time tvdo 85 ns w551c mode interface (vdd ? vss = 4.5 v , ta = 25 ? c; unless otherwise specified) parameter sym. conditions min. typ. max. unit clock frequency of addr f addr vdd = 3.0v - - 6 mhz clock frequency of clk f clk vdd < 3.0v vdd R 3.0v - - 1 1.5 mhz interval time between addr and clk t i read mode 1 - - us interval between data to another pin active t cfa - 10 - - us data access time t ra read mode - - 500 ns data setup time t as address shift - in 40 - - ns data hold time t rh rea d mode 0 - - ns t ah address shift - in 10 - - ns transmission time between data1 and data2 t d12 t d21 cascade mode, v dd =2.4v 35 20 - - ns ps switch time t ps1 t ps2 read mode 500 500 - - ns cs switch time tc s1 tc s2 read mode 500 500 - - ns sck csb sdi tsui thdi sdo tvdo thdo tdbo tsck spi mode interface tsse tssb tssh (hi impedance)
n 5 51c321 - 6 - 7. a pplication circuit 7.1 w551c mode mcu (w588dxxx) N551C321 ( w551c mode ) bs bs bp1[7] bp1[ 5 ] bp1[ 6 ] bp1[ 4 ] clk addr data1 wdp data rdp
n 5 51c321 - 7 - 7.2 spi mode 8. revision history version date reasons f or c hange a 1.0 nov , 20 10 first establishment a2.0 sep - 2011 revise addr, clk spec in page 5 mcu (w588dxxx) bp1[ 5 ] bp1[ 6 ] bp1[ 4 ] N551C321 ( spi mode ) csb sclk sdi sdo bp1[3]
n 5 51c321 - 8 - important notice nuvoton products are neither intended nor warranted for usage in systems or equipment, any malfunction or failure of which may cause loss of human life, bodily injury or severe property damage. such applications are deemed, ins ecure usage. insecure usage includes, but is not limited to: equipment for surgical implementation, atomic energy 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 sustain 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 custom ers insecure usage, customer shall indemnify the damages and liabilities thus incurred by nuvoton.
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