5.3 Configuration Memory

The configuration memory consists of 2048 bits of EEPROM memory used for storing passwords, keys, codes, and defining security levels to be used for each user zone. The control logic defines access rights to the configuration memory, and the user may not alter these rights. The access rights include the ability to program certain portions of the configuration memory, and then lock the data written through use of security fuses. The configuration memory for each CryptoMemory® device is identical, with the exception of the number of access registers and password/key registers available. Devices with four user zones have four sets of registers, and those with eight user zones have eight sets of registers. Unused memory space in the register region becomes reserved to ensure that other components of the configuration memory remain at the same address location regardless of the number of user zones in a device.

Table 5-1. AT88SC0104CA/0204CA/0404CA Configuration Memory
	$0	$1	$2	$3	$4	$5	$6	$7
$00	Answer-to-Reset								Identification
$08	FAB Code		MTZ		Card Manufacturer Code				Identification
$10	Lot History Code								Read-Only
$18	DCR	Identification Number Nc							Access Control
$20	AR0	PR0	AR1	PR1	AR2	PR2	AR3	PR3
$28	Reserved
$30
$38
$40	Issuer Code
$48	Issuer Code
$50	AAC0	Cryptogram C₀							Cryptography
$58	Session Encryption Key S₀
$60	AAC1	Cryptogram C₁
$68	Session Encryption Key S₁
$70	AAC2	Cryptogram C₂
$78	Session Encryption Key S₂
$80	AAC3	Cryptogram C₃
$88	Session Encryption Key S₃
$90	Secret Seed G₀								Secret
$98	Secret Seed G₁
$A0	Secret Seed G₂
$A8	Secret Seed G₃
$B0	PAC	Write 0			PAC	Read 0			Password
$B8	PAC	Write 1			PAC	Read 1
$C0	PAC	Write 2			PAC	Read 2
$C8	PAC	Write 3			PAC	Read 3
$D0	PAC	Write 4			PAC	Read 4
$D8	PAC	Write 5			PAC	Read 5
$E0	PAC	Write 6			PAC	Read 6
$E8	PAC	Write 7			PAC	Read 7
$F0	Reserved								Forbidden
$F8	Reserved								Forbidden

Table 5-2. AT88SC0808CA Configuration Memory
	$0	$1	$2	$3	$4	$5	$6	$7
$00	Answer-to-Reset								Identification
$08	FAB Code		MTZ		Card Manufacturer Code				Identification
$10	Lot History Code								Read-Only
$18	DCR	Identification Number Nc							Access Control
$20	AR0	PR0	AR1	PR1	AR2	PR2	AR3	PR3
$28	AR4	PR4	AR5	PR5	AR6	PR6	AR7	PR7
$30	Reserved
$38	Reserved
$40	Issuer Code
$48	Issuer Code
$50	AAC0	Cryptogram C₀							Cryptography
$58	Session Encryption Key S₀
$60	AAC1	Cryptogram C₁
$68	Session Encryption Key S₁
$70	AAC2	Cryptogram C₂
$78	Session Encryption Key S₂
$80	AAC3	Cryptogram C₃
$88	Session Encryption Key S₃
$90	Secret Seed G₀								Secret
$98	Secret Seed G₁
$A0	Secret Seed G₂
$A8	Secret Seed G₃
$B0	PAC	Write 0			PAC	Read 0			Password
$B8	PAC	Write 1			PAC	Read 1
$C0	PAC	Write 2			PAC	Read 2
$C8	PAC	Write 3			PAC	Read 3
$D0	PAC	Write 4			PAC	Read 4
$D8	PAC	Write 5			PAC	Read 5
$E0	PAC	Write 6			PAC	Read 6
$E8	PAC	Write 7			PAC	Read 7
$F0	Reserved								Forbidden
$F8	Reserved								Forbidden