ATSHA204 ATMEL [ATMEL Corporation], ATSHA204 Datasheet - Page 47

• Manufacturer Part Number: ATSHA204
• Description: Atmel CryptoAuthentication
• Manufacturer: ATMEL [ATMEL Corporation]

Table 8-24. Mode Encoding
Bits
7
6
5
4
3
2
1
0
Meaning
Must be zero.
If set, include the 48 bits SN[2:3] and SN[4:7] in the message.
Otherwise, the corresponding message bits are set to zero.
Include the first 64 OTP bits (OTP[0] through OTP[7]) in the message.
Otherwise, the corresponding message bits are set to zero.
If Mode[4] is set, the value of this mode bit is ignored.
Include the first 88 OTP bits (OTP[0] through OTP[10]) in the message.
Otherwise, the corresponding message bits are set to zero.
Must be zero.
If either Mode:0 or Mode:1 are set, Mode:2 must match the value in TempKey.SourceFlag or the command will
return an error.
If zero, the first 32 bytes of the SHA message are loaded from one of the data slots.
If one, the first 32 bytes are filled with TempKey.
If zero, the second 32 bytes of the SHA message are taken from the input Challenge parameter.
If one, the second 32 bytes are filled with the value in TempKey. This mode is recommended for all use.
Atmel ATSHA204 [DATASHEET]
8740D−CRYPTO−3/12
47