AT88SC1616CRF View Datasheet(PDF) - Atmel Corporation
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Description
MFG CO.
'AT88SC1616CRF' PDF : 158 Pages View PDF
AT88SC0808/1616/3216/6416CRF, AT88RF04C
Table 67. Communication Security Mode options for 88RF PICCs.
M2
M1
M0
Communication Security Mode
0
0
0 Reserved For Future Use (Not Supported)
0
0
1 Reserved For Future Use (Not Supported)
0
1
0 Authentication for Read / Encryption for Write
0
1
1 Authentication for Read / Write
1
0
0 Encryption for Write
1
0
1 Authentication for Write
1
1
0 Encryption for Read / Write
1
1
1 No Authentication or Encryption Required
Primary Key (PK)
N/A
N/A
Read / Write Access
Read / Write Access
Read / Write Access
Read / Write Access
Read / Write Access
N/A
Read-Only Key (ROK)
N/A
N/A
Read Access
Read Access
N/A
N/A
Read Access
N/A
MDF:
Modify Forbidden mode control.
By default the Modify Forbidden mode is disabled. If MDF = 0b then Modify Forbidden mode is enabled and no write
access is allowed to the User Zone. The User Zone effectively becomes Read Only Memory (ROM).
PGO:
Program Only mode control.
By default the Program Only mode is disabled. If PGO = 0b then data within the User Zone may be changed from 1b to
0b, but never from 0b to 1b. Note that PGO is only available in User Zone 1. If PGO is enabled, then the Write User
Zone data verification function is disabled when writing to User Zone 1 of 88RF PICCs. The PGO option is not available
in User Zones 0, 2, and 3 of 88RF PICCs.
H.2.1. Password Registers (PR) [88SC]
There is one Password Register for each User Zone in the user memory. The default state of this register is $FF.
Figure 26. 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 Password Register bit definitions are shown in Figure 26. Changes to the PR registers are effective immediately.
AK:
Authentication Key Set selection bits.
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. Any number of PR registers can point to the same
key set, allowing multiple User Zones to use the same key set.
Table 68.
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
97
5276C–RFID–3/09
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