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参数资料
| 型号： | DS2703UR |
| 英文描述： | SHA-1 Battery Pack Authentication IC |
| 中文描述： | SHA - 1的电池组认证IC |
| 文件页数： | 8/20页 |
| 文件大小： | 238K |
| 代理商： | DS2703UR |
DS2703 SHA-1 Battery Pack Authentication IC
8 of 20
Table 3. Authentication Function Commands
COMMAND
HEX
FUNCTION
Write Challenge
0C
Writes 64-bit challenge for SHA-1 processing. Required prior to
either Compute MAC command.
Compute MAC
without
ROM ID
and return MAC
Compute MAC
with
ROM ID and
return MAC
SECRET MANAGEMENT FUNCTION COMMANDS
LOAD SECRET [5Ah].
This command writes the 64-bit secret to the provided 64-bit data argument value. The host
must apply a programming pulse to write the secret value to EEPROM.
COMPUTE NEXT SECRET WITHOUT ROM ID [30h].
This command initiates a SHA-1 computation of the MAC
and uses a portion of the resulting MAC as the next or new secret. The MAC computation is performed with the
current 64-bit secret and the 64-bit challenge. Logical 1’s are loaded in in place of the ROM ID since the ROM ID
data is not used in this command. Two words (64 bits) of the output MAC are used as the new secret value. The
host must allow t
COMP
after issuing this command for the SHA calculation to complete, then apply a programming
pulse to write the new secret value to EEPROM.
COMPUTE NEXT SECRET WITH ROM ID [33h].
This command initiates a SHA-1 computation of the MAC and
uses a portion of the resulting MAC as the next or new secret. The MAC computation is performed with the current
64-bit secret, the 64-bit ROM ID, and the 64-bit challenge. Two words (64 bits) of the output MAC are used as the
new secret value. The host must allow t
COMP
after issuing this command for the SHA calculation to complete, then
apply a programming pulse to write the new secret value to EEPROM.
LOCK SECRET [6Ah].
This command write protects the 64-bit Secret to prevent accidental or malicious overwrite
of the secret value. The Secret value stored in EEPROM becomes "final." The host must apply a programming
pulse to write the secret lock bit to EEPROM.
Table 4. Secret Loading Function Commands
COMMAND
HEX
Load Secret
5A
Loads the Secret with 64-bit data argument
Compute Next Secret
without
ROM ID
Compute Next Secret
with
ROM ID
36
Computes hash with logical 1’s in place of the ROM_ID
35
Computes hash including the ROM_ID
FUNCTION
30
Generates new global secret
33
Generates new unique secret
Lock Secret
6A
Sets lock bit to prevent changes to the Secret
1-Wire SPEED CONTROL FUNCTION COMMANDS
CLEAR OVERDRIVE [8Dh].
This command clears the 1-Wire Overdrive bit to select the Standard 1-Wire timings
shown in the Electrical Characteristics table. The Overdrive bit is stored in EEPROM so that the programmed
speed selection can be recalled on initial power up. The host must apply a programming pulse to complete the
command.
SET OVERDRIVE [8Bh].
This command sets the 1-Wire Overdrive bit to select the Overdrive 1-Wire timings
shown in the Electrical Characteristics table. The Overdrive bit is stored in EEPROM so that the programmed
speed selection can be recalled on initial power up. The host must apply a programming pulse to complete the
command.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2703UT | SHA-1 Battery Pack Authentication IC |
| DS2715 | NiMH Battery Pack Charge Controller |
| DS2715Z | NiMH Battery Pack Charge Controller |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2703UT | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Battery Pack Authentication IC |
| DS2704 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1280-Bit EEPROM with SHA-1 Authentication |
| DS2704-500-WAFER | 功能描述:电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| DS2704E+ | 制造商:Maxim Integrated Products 功能描述:1024 BIT MEM W/SHA-1 AUTH L/F - Rail/Tube |
| DS2704G+ | 功能描述:电可擦除可编程只读存储器 1280-Bit 电可擦除可编程只读存储器 w/SHA-1 Authent RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
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