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参数资料
| 型号： | DS2704G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/18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
EEPROM STATUS
The DS2704 has a separate 8-byte linear address space for access to the EEPROM Status data field using the
Read Status and Write Status Function Commands.
READ STATUS [AAh]. The Read Status command is used to read data from the EEPROM Status data field. The
bus master follows the command byte with a 2-byte address (TA1=(T7:T0), TA2=(T15:T8)) that indicates a starting
byte location within the data field. An 8-bit CRC of the command byte and address bytes is computed by the
DS2704 and read back by the bus master to confirm that the correct command word and starting address were
received. If the CRC is deemed to be incorrect by the bus master, a reset pulse should be issued and the entire
sequence repeated. If the CRC is deemed to be correct by the bus master, read time slots can be issued to receive
data starting at the initial address. The bus master can issue a reset pulse at any point or continue to issue read
time slots until the end of the EEPROM Status data field is reached. If reading occurs through the end of the
EEPROM Status data field, the bus master can issue eight additional read time slots and the DS2704 will respond
with a 8-bit CRC of all data bytes read from the initial starting byte through the last byte. Additional read time slots
return logical 1’s. The Read Status command sequence can be ended at any point by issuing a reset pulse.
Table 5. EEPROM Status Field
ADDRESS (HEX)
0000
0001
0002
0003
0004
0005-0006
0007
DESCRIPTION
Write Protect Page bits
B0: Page 0 Write Protect
B1: Page 1 Write Protect
B2: Page 2 Write Protect
B3: Page 3 Write Protect
B4: Page 4 Write Protect
B5: Reserved for TMEX
B6: Reserved for TMEX
B7: Reserved for TMEX
Factory Programmed to FFh
Factory Programmed to FFh
Factory Programmed to FFh
Factory Programmed to FFh
Reserved
Factory Programmed to 00h
READ/WRITE
R/W*
R
R
R
R
R
R
* One time write to “0”
WRITE STATUS [55h]
The Write Status command is used to program the EEPROM Status data field. Only the Write Protect Page bits at
address 0000h are writable. The other bytes are factory programmed to the values in Table 5. The Write Protect
Page bits are set to logical 1’s when received from the factory. EEPROM page data can be programmed multiple
times until its associated Write Protect Page bit is programmed to a logical 0. Once a Write Protect Page bit is
programmed to a logical 0, it cannot be programmed back to a logical 1. Programming a Write Protect Page bit to a
logical 0 prevents any future modification or overwriting of the data in the associated page.
To protect page data from modification, the bus master writes the Write Status function command followed by one
byte of status data containing the Write Protect Page bits (B7:B0). The status data must be written least significant
bit to most significant bit, that is B0 to B7. Once the eighth bit of the status data is completed, the write operation
cannot be undone. If the write operation is abandoned prior to completing the status data byte, the entire write
sequence must be repeated after issuing a reset pulse.
After the programming write delay (t EEC ), the master can issue a Read Status function command to verify that the
appropriate Write Protect Page bits have been programmed.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2704K | 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 |
| DS2704REVKIT+ | 制造商:Maxim Integrated Products 功能描述:RMS POWER DETECTOR - Boxed Product (Development Kits) |
| DS2704RG+ | 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 |
| DS2704RG+T&R | 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 |
| DS2704R-K | 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 |
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