AT88RF04C-MY1G 查看數據表（PDF） - Atmel Corporation
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AT88RF04C-MY1G Datasheet PDF : 158 Pages
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AT88SC0808/1616/3216/6416CRF, AT88RF04C
K.4.
The Password Register [88SC]
The Password Registers are used to select the Key Sets for Authentication or Encryption Communication Security on
88SC PICCs. Any Key Set can be used with any User Zone by programming the Password Register for the User Zone
with the appropriate AK and POK values. One Key Set can be used with any number of User Zones.
Figure 36. Definition of the User Zone Password Registers on 88SC PICCs.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AK1 AK0 POK1 POK0 RFU PW2 PW1 PW0
1
1
1
1
1
1
1
1 Default Value
The Authentication Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the AK bits.
Table 95.
AK1
0
0
1
1
Coding of the Authentication Key Set select bits for CryptoRF communication security.
AK0
Authentication Key
Encryption Key
0
Secret Seed G0
Session Key S0
1
Secret Seed G1
Session Key S1
0
Secret Seed G2
Session Key S2
1
Secret Seed G3
Session Key S3
The Program-Only Key Set selection bits control the key set assigned to a User Zone for communication security. The
Access Register bits determine the Communication Security mode associated with the POK bits. The POK bits are only
used in Dual Access Authentication mode.
Table 96. Coding of the Program-Only Key Set select bits for CryptoRF communication security.
POK1
POK0
Authentication Key
0
0
Secret Seed G0
0
1
Secret Seed G1
1
0
Secret Seed G2
1
1
Secret Seed G3
5276C–RFID–3/09
117
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