n 5 51c161 - 1 - table of contents - 1. general description ................................ ................................ ................................ ......... 2 2. features ................................ ................................ ................................ ................................ . 2 3. block diagra m ................................ ................................ ................................ ...................... 2 4. pin description ................................ ................................ ................................ ..................... 3 5. absolute maximum rat ings ................................ ................................ .............................. 3 6. electr ical characteristics ................................ ................................ ........................... 3 7. application circuit ................................ ................................ ................................ ............. 4 8. revision history ................................ ................................ ................................ .................. 5
n 5 51c161 - 2 - 1. general description the N551C161 is an 16 - mbit mask rom with interface with nuvoton powerspeech, banddirector and viewtalk 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: 16 - mbit ? spi rom interface ? normal read access time: 500 ns ? operating current: 2.5 ma (max.) ? available package form: ? cob is essential 3. block diagram
n 5 51c161 - 3 - 4. pin description symbol i/o function sdi i command/address input sdo o data output sclk i clo ck input 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 supply ( - ). 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 operating temp. t opr - 0 ~ + 70 ? c note: operating the device under conditions beyond those in dicated 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 specified) parameter sym. conditions min. typ. max. unit operating v oltage v dd 2.4 5.5 v o peration current iop2 spi interface mode, data output rate 2mhz 2.5 ma standby current isb 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
n 5 51c161 - 4 - ac parameters (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 select l ead 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 7. application circuit sck csb sdi tsui thdi sdo tvdo thdo tdbo tsck spi mode interface tsse tssb tssh (hi impedance)
n 5 51c161 - 5 - 8. revision history version date substantial change s page a1.0 sep. 2012 initial release al l a2.0 jul. 2012 revise interface of application circuit
n 5 51c161 - 6 - 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, insecure usage. insecure usage includes, but is not limited to: equipment for surgical implementation, atomic energy control instruments, airplane or spaceship instrument s, 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 customer s 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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