The default state of the fuses when CryptoRF leaves the factory is SEC = 0b and the remaining three fuses set to 1b.
The left fuse column in Table 62 and Table 63 show the access conditions for this default fuse state.
Table 62. Configuration Memory Access control by Security Fuse State for 88SC PICCs.
Fuse State
Registers
Operation
SEC = 0b
FAB = 1b
CMA = 1b
PER = 1b
SEC = 0b
FAB = 0b
CMA = 1b
PER = 1b
SEC = 0b
FAB = 0b
CMA = 0b
PER = 1b
Anticollision
(Except MT2 and CMC)
Read
Write
Open
Transport PW
Open
Forbidden
Open
Forbidden
Memory Test Zone
(MTZ)
Read
Write
Open
Open
Open
Card Manufacturer Code
(CMC)
Read
Write
Open
Transport PW
Open
Transport PW
Open
Forbidden
Read Only
(Lot History Code)
Read
Write
Open
Forbidden
Open
Forbidden
Open
Forbidden
Access Control
Read
Write
Open
Transport PW
Open
Transport PW
Open
Transport PW
Cryptography
(Except Encryption Key S)
Read
Write
Open
Transport PW
Open
Transport PW
Open
Transport PW
Encryption Keys
(S)
Read
Write
Transport PW Transport PW Transport PW
Secret
Read
Write
Transport PW Transport PW Transport PW
Passwords
Read
Write
Transport PW Transport PW Transport PW
Password Attempt
Counters
(PAC)
Read
Write
Open
Transport PW
Open
Transport PW
Open
Transport PW
Forbidden
Read
Write
Forbidden
Forbidden
Forbidden
SEC = 0b
FAB = 0b
CMA = 0b
PER = 0b
Open
Forbidden
Open
Open
Forbidden
Open
Forbidden
Open
Forbidden
Open
Forbidden
Forbidden
Forbidden
Write PW
Open
Write PW
Forbidden
The register access conditions in Table 62 and Table 63 are color coded. Open access is indicated by green. No
access permitted is indicated by magenta. If access is restricted, then the field is yellow. Blue fields indicate that
Encryption Activation is required for access.
For registers with restricted access, the requirement to gain access is indicated by the text. The text “Transport PW”
indicates that if the Transport Password is validated using the Check Password command, then access is granted. The
text “Write PW” indicates that if the Write Password of a password set is validated using the Check Password
command, then access is granted to the PAC registers and password registers for that password set only.
92 AT88SC0808/1616/3216/6416CRF, AT88RF04C
5276C–RFID–3/09