NM93CS66

www.DataSheet4U.com NM93CS06 CS46 CS56 CS66 (MICROWIRE Bus Interface) 256- 1024- 2048- 4096-Bit Serial EEPROM with Data Protect and Sequential Read August 1994 NM93CS06 CS46 CS56 CS66 (MICROWIRE TM Bus Interface) 256- 1024- 2048- 4096-Bit Serial EEPROM with Data Protect and Sequential Read General Description The NM93CS06 CS46 CS56 CS66 devices are 256 1024 2048 4096 bits respectively of CMOS non-volatile electrically erasable memory divided into 16 64 128 256 16-bit registers Selected registers can be protected against data modification by programming the Protect Register with the address of the first register to be protected against data modification (all registers greater than or equal to the selected address are then protected from further change) Additionally this address can be ‘‘locked’’ into the device making all future attempts to change data impossible These devices are fabricated using National Semiconductor floating-gate CMOS process for high reliability high endurance and low power consumption The NM93CSXX Family is offered in an SO package for small space considerations The EEPROM interfacing is MICROWIRE compatible providing simple interfacing to standard microcontrollers and microprocessors There are a total of 10 instructions 5 which operate on the EEPROM memory and 5 which operate on the Protect Register The memory instructions are READ WRITE WRITE ALL WRITE ENABLE and WRITE DISABLE The Protect register instructions are PRREAD PRWRITE PRENABLE PRCLEAR and...