参数资料
型号: DS2704G+T&R
厂商: Maxim Integrated Products
文件页数: 15/18页
文件大小: 0K
描述: IC EEPROM 1.25KBIT 6TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 10,000
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 1.25K(32B x 5 页)
接口: 1 线 串行
电源电压: 2.5 V ~ 5.5 V
工作温度: -30°C ~ 85°C
封装/外壳: 6-WDFN 裸露焊盘
供应商设备封装: 6-TDFN 裸露焊盘(3x3)
包装: 带卷 (TR)
DS2704: 1280-Bit EEPROM with SHA-1 Authentication
Table 7. All Function Commands
COMMAND
HEX
FUNCTION
COMPATIBILITY
DS2502  DS2703
Writes 64-bit challenge for SHA-1
Write Challenge
Compute MAC
without ROM ID and
return MAC
Compute MAC
with ROM ID and
return MAC
Clear Secret
Compute Next Secret
without ROM ID
Compute Next Secret
with ROM ID
Lock Secret
Read Memory
Read Data/Generate
CRC
Read All
Read Status
Write Status
Write Scratchpad
Read Scratchpad
Copy Scratchpad
Set Overdrive
Clear Overdrive
Reset
0C
36
35
5A
30
33
6A
F0
C3
65
AA
55
6C
69
48
8B
8D
BB
processing. Required prior to all Compute
MAC and Compute Next Secret commands.
Computes hash of the message block with all
1’s in place of the ROM ID.
Computes hash of the message block using
the ROM ID.
Clears the 64-bit secret to 0000 0000 0000
0000h.
Generates new global secret.
Generates new unique secret.
Sets lock bit to prevent changes to the
Secret.
Read data from 1024-bit EEPROM Memory
data field.
Read data from 1024-bit EEPROM Memory
data field and generate a CRC value of the
data read during the operation.
Read data from the all 5 pages of the
EEPROM Memory data field.
Read data from the 8-byte EEPROM Status
data field.
Write data to the EEPROM Status data field.
Write data to the 8-byte Scratchpad buffer.
Read data from the 8-byte Scratchpad buffer.
Write Scratchpad data to EEPROM data
field.
Sets 1-Wire interface timings to
OVERDRIVE.
Sets 1-Wire interface timings to STANDARD.
(Factory Default).
Resets DS2704 (Software POR).
CC
CC
CC
NP
CC
CC
CC
NP
NP
NP
NP
NP
CC
Key: CC ? complete compatibility, NP ? no programming pulse required on DS2704.
15 of 18
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