AT88SA102S_10 ATMEL [ATMEL Corporation], AT88SA102S_10 Datasheet - Page 15

• Manufacturer Part Number: AT88SA102S_10
• Description: Atmel CryptoAuthentication
• Manufacturer: ATMEL [ATMEL Corporation]

8584F–SMEM–8/10
Table 5-2.
Regardless of the value of <mode> the first 512-bit block of the message that will be hashed with the SHA-256
algorithm will consist of:
The second block consists of the following information:
Mode is encoded as follows:
Table 5-3.
Name
Response
Bits
3-0
7
6
5
4
256-bits
256-bits
255-bit
16-bits
64-bits
24-bits
32-bits
16-bits
16-bits
64-bit
8-bits
8-bits
8-bits
1-bit
Output Parameters
Mode Encoding
Should be zero
If set; include the 48-bit serial number (combination of fuses and ROM values) in the message
Otherwise, the corresponding message bits are set to zero
If set and Fuse[87] is burned; include the 64-secret fuses (Fuse[0] through Fuse[63]) in the message
Otherwise, the corresponding message bits are set to Zero
If Mode[4] is set, then the value of this mode bit is ignored
If set and Fuse[87] is burned; include the 64-secret fuses and 24-status fuses (Fuse[0] through Fuse[87]) in
the message
Ootherwise, the corresponding message bits are set to zero
Should be zero
Size
32
key[KeyID]
challenge
Opcode (always 0x08)
Mode
KeyID
Secret Fuses including BurnFuse and BurnSecure enable (or 0’s, see below)
Status Fuses including FuseDisable (or 0’s, see below)
Fuse MfrID fuses, (Fuse[88:95]) (never zero’d out)
Fuse SN, (Fuse[96:127]) (or 0’s, see below)
ROM MfrID (never zero’d out)
ROM SN (or 0’s, see below)
‘1’ pad
‘0’ pad
total length of message in bits (512+192=704), excluding pad and length
Notes
SHA-256 digest
Meaning
Atmel AT88SA102S
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