AT88SC1608
Table 2. Configuration Zone
The last 1K bit of the memory is a configuration zone with specific system data, access
rights, and read/write commands; it is divided into six subzones.
Configuration
$0
$1
$2
$3
$4
$5
$6
$7
Fabrication
Answer-to-Reset
Fab Code
Reserved
Lot History Code
$00
Card Manufacturer Code
$08
Access
AR0
AR1
AR2
AR3
AR4
AR5
AR6
AR7
$10
Reserved for Future Use
$18
AAC
Identification Number (Nc)
$20
Authentication
Cryptogram (Ci)
$28
Secret
Secret Seed (Gc)
$30
Test
Reserved for Memory Test
$38
PAC
Write 0
PAC
Read 0
$40
PAC
Write 1
PAC
Read 1
$48
PAC
Write 2
PAC
Read 2
$50
Passwords
PAC
Write 3
PAC
Read 3
$58
PAC
Write 4
PAC
Read 4
$60
PAC
Write 5
PAC
Read 5
$68
PAC
Write 6
PAC
Read 6
$70
PAC
Secure Code/Write 7
PAC
Read 7
$78
Note:
AAC: Authentication Attempts Counter
PAC: Password Attempts Counter
AR0−7: Access Register for User Zone 0 to 7
Fuses
FAB, CMA, and PER are nonvolatile fuses blown at the end of each card life step. Once
blown, these EEPROM fuses can not be reset.
• The FAB fuse is blown by Atmel prior to shipping wafers to the card manufacturer.
• The CMA fuse is blown by the card manufacturer prior to shipping cards to the
issuer.
• The PER fuse is blown by the issuer prior to shipping cards to the end user.
The fuses are read and written in the configuration zone using the address $80.
Table 3. Fuse Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0
PER
CMA
FAB
$80
5
0971G–SMEM–04/04