参数资料
型号: AT88SA100S-TSU-T
厂商: Atmel
文件页数: 13/23页
文件大小: 0K
描述: IC BATT AUTHENTICATION SOT23-3
产品培训模块: CryptoAuthentication™ Introduction
标准包装: 1
系列: CryptoAuthentication™
功能: 电池验证
电源电压: 2.7 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: TO-236-3,SC-59,SOT-23-3
供应商设备封装: SOT-3
包装: 标准包装
其它名称: AT88SA100S-TSU-TDKR
6.1
MAC
Computes a SHA-256 digest of the key, challenge and other fixed information on the chip to generate an output response. If
MemValid is not set, indicating that no valid key is stored in the SRAM, then this command will return an error. The hashed
message includes the following bytes, concatenated in this order:
256-bits
256-bits
8-bits
8-bits
16-bits
88-bits
8-bits
32-bits
16-bits
16-bits
1-bit
255-bits
64-bits
Key (Stored in Sram)
Challenge
Opcode (always 0x08)
Mode input
Param2 input
All zeros
Fuse MfrID (Fuse[88-95])
Fuse SN (Fuse[96-127]) or zeros
ROM MfrID
ROM SN or zeros
1’s – SHA-256 padding
0’s – SHA-256 padding
Length (704) per SHA-256
Table 6-1.
Input Parameters
Name
Size
Notes
Opcode
Param1
Param2
Data
Table 6-2.
MAC
Mode
Zero
Challenge
Output Parameters
1
1
2
32
0x08
Must be 0x0000
Input portion of message to be digested.
Name
Response
Size
32
Notes
SHA-256 digest
Table 6-3.
Bit
6
0-5, 7
Mode Encoding
Notes
If set, then the four bytes of Fuse SN and the two bytes of ROM SN will be included in the message,
otherwise these bits will be set to zero in the message.
Ignored, must be all zero.
13
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