DESCRIPTION
SC23M42  is  a  smart  card  module  utilizing  CMOS  EEPROM technology.  256  bytes  main  memory,  32-bit  protection  memory,  3 bytes  user  password,  and  3-bit  password  wrong  counter  (Value: 00000D2D1D0).  And  the  periphery  interface  is  compatible  with ISO7816 agreement (synchronous propagation).

FEATURES
* 256 X 8 bit EEPROM
* Byte addressing
* Write-protect area (former 32 bytes) can execute the write-protect
   separately,  and  after  the  write-protect,  the  content  cannot  be
   changed.
* 32 X 1bit  protect memory
* Serial two buses interface
* More than 100,000 times write endurance cycles
* Data retention of more than 10 years
* Contact  definition  and  serial  interface  comply  to  ISO7816
   specification (synchronous propagation)
* 3 Bytes user password, 3 bits(bit0-bit2) error counter
*  Before the  password  is checked,  all the  data  can  be read;  if  the
   password  is  correct,  you  can  write  or  amend  the  data  and  the
   password.
*  Password  error  counter,  and  the  initial  value  is  3.  Checking  the
   password once, subtracts 1, if  the value of the counter is 0, the
   memory card will be locked automatically, and the data can only
   be read, the password cannot be checked again; When the value
   of the counter is not 0, if the password checking is correct for one
   time,  the value comes back to initial value.
* Comply to SLE4442

APPLICATIONS
* used for various IC memory cards.