4442 Chip Module

  The FM4442 consists of 256 x 8 bits EEPROM main memory and a 32-bit protection memory with PROM functionality. The main memory is erased and written byte by byte. Each of the first 32 bytes can be irreversibly protected against data change by writing the corresponding bit in the protection memory. Each data byte in this address range is assigned to one bit of the protection memory and has the same address as the data byte in the main memory which it is assigned to. Once written the protection bit cannot be erased (PROM). 

Function Description:

  Compatible SLE4442 

  Only after entry of the correct 3Bytes programmable security code (PSC)

  Contact configuration and serial interface in accordance with ISO standard 7816 (synchronous transmission)

  Data retention for minimum of ten years

  Minimum of 100000 write/erase cycles

  Irreversible byte-wise write protection of lowest 32 addresses (Byte 0 ... 31)

  Irreversible byte-wise write protection

  Byte-wise addressing

  256

256*8-bits EEPROM,Compatible SLE4442,Minimum of 100000 write/erase cycles,Data retention for minimum of ten years,ISO 7816