Datenblatt-Suchmaschine für elektronische Bauteile |
|
ST93CS56 Datenblatt(PDF) 6 Page - STMicroelectronics |
|
ST93CS56 Datenblatt(HTML) 6 Page - STMicroelectronics |
6 / 16 page POWER-ON DATA PROTECTION In order to prevent data corruption and inadvertent write operations during power up, a Power On Reset (POR) circuit resets all internal programming circuitry and sets the device in the Write Disable mode. When VCC reaches its functional value, the device is properlyreset (in the Write Disable mode) and is ready to decode and execute an incoming instruction. A stable VCC must be applied before any logic signal. INSTRUCTIONS The ST93CS56/57 has eleven instructions, as shown in Table 6. Each instruction is composed of a 2 bit op-code and an 8 bit address. Each instruc- tion is preceded by the rising edge of the signal applied on the Chip Select ( S) input (assuming that the Clock C is low). The data input D is then sampled upon the following rising edges of the clock C until a ’1’ is sampled and decoded by the ST93CS56/57 as a Start bit. The ST93CS56/57 is fabricated in CMOS technol- ogy and is therefore able to run from zero Hz (static input signals) up to the maximum ratings (specified in Table 5). Read The Read instruction (READ) outputs serial data on the Data Output (Q). When a READ instruction is received, the instruction and address are de- coded and the data from the memory is transferred into an output shift register. Adummy ’0’ bit is output first followed by the 16 bit word with the MSB first. Instruction Description W pin (1) PRE pin Op Code Address (1, 2) Data Additional Information READ Read Data from Memory X ’0’ 10 A7-A0 Q15-Q0 WRITE Write Data to Memory ’1’ ’0’ 01 A7-A0 D15-D0 Write is executed if the address is not inside the Protected area PAWRITE Page Write to Memory ’1’ ’0’ 11 A7-A0 D15-D0 Write is executed if all the addresses are not inside the Protected area WRALL Write All Memory ’1’ ’0’ 00 01XX XXXX D15-D0 Write all data if the Protect Register is cleared WEN Write Enable ’1’ ’0’ 00 11XX XXXX WDS Write Disable X ’0’ 00 00XX XXXX PRREAD Protect Register Read X ’1’ 10 XXXX XXXX Q8-Q0 Data Output = Protect Register content + Protect Flag bit PRWRITE Protect Register Write ’1’ ’1’ 01 A7-A0 Data above specified address A7-A0 are protected (2) PRCLEAR Protect Register Clear ’1’ ’1’ 11 1111 1111 Protect Flag is also cleared (cleared Flag = 1) PREN Protect Register Enable ’1’ ’1’ 00 11XX XXXX PRDS Protect Register Disable ’1’ ’1’ 00 0000 0000 OTP bit is set permanently Notes: 1. X = don’t care bit. 2. Address bit A7 is not decoded by the ST93CS56/57. Table 6. Instruction Set 6/16 ST93CS56, ST93CS57 |
Ähnliche Teilenummer - ST93CS56 |
|
Ähnliche Beschreibung - ST93CS56 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |