AT88SC153 データシートの表示（PDF） - Atmel Corporation
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AT88SC153 Datasheet PDF : 24 Pages
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AT88SC153
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 device responds to a read fuse command with fuse byte.
Table 4. 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
Table 5. Access Rights
Zone
Fabrication
(Except CMC, MTZ and AR)
Card Manufacturer
Code
Access Registers
Memory Test Zone
Identification
Secret
Passwords
PAC
User Zones
When the fuses are all “1”s, read and write are allowed in the entire memory. Before
blowing the FAB fuse, Atmel writes the entire memory to “1” and programs the fabrica-
tion subzone (except CMC and AR) and the secure code.
Access
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
FAB = 0
Free
Forbidden
Free
Secure Code
Free
Secure Code
Free
Free
Free
Secure Code
Secure Code
Secure Code
Secure Code
Secure Code
Free
Secure Code
AR
AR
CMA = 0
Free
Forbidden
Free
Forbidden
Free
Secure Code
Free
Free
Free
Secure Code
Secure Code
Secure Code
Secure Code
Secure Code
Free
Secure Code
AR
AR
PER = 0
Free
Forbidden
Free
Forbidden
Free
Forbidden
Free
Free
Free
Forbidden
Forbidden
Forbidden
Write PW
Write PW
Free
Write PW
AR
AR
Note:
CMC: Card Manufacturer Code
AR: Access Rights as defined by the access registers
PW: Password
5
1016D–SMEM–04/04
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