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参数资料
| 型号： | DS2431P |
| 元件分类： | DRAM |
| 英文描述： | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
| 中文描述： | 该CAT24FC02是一个2 KB的EEPROM的国内256个8位每字举办的串行CMOS |
| 文件页数： | 5/23页 |
| 文件大小： | 170K |
| 代理商： | DS2431P |
DS2431: 1024-Bit, 1-Wire EEPROM
5 of 23
Figure 2. Hierarchical Structure for 1-Wire Protocol
Available
Commands:
DS2431 Command Level:
Data Field
Affected:
1-Wire ROM Function
Commands (see Figure 9)
DS2431-specific
Memory Function
Commands (see Figure 7)
Read ROM
Match ROM
Search ROM
Skip ROM
Resume
Overdrive Skip
Overdrive Match
64-bit Reg. #, RC-Flag
64-bit Reg. #, RC-Flag
64-bit Reg. #, RC-Flag
RC-Flag
RC-Flag
64-bit Reg. #, RC-Flag, OD-Flag
64-bit Reg. #, RC-Flag, OD-Flag
Write Scratchpad
Read Scratchpad
Copy Scratchpad
Read Memory
64-bit Scratchpad, Flags
64-bit Scratchpad
Data Memory, Register Page
Data Memory, Register Page
64-BIT LASERED ROM
Each DS2431 contains a unique ROM code that is 64 bits long. The first 8 bits are a 1-Wire family code. The next
48 bits are a unique serial number. The last 8 bits are a CRC (Cyclic Redundancy Check) of the first 56 bits. See
Figure 3 for details. The 1-Wire CRC is generated using a polynomial generator consisting of a shift register and
XOR gates as shown in Figure 4. The polynomial is X
8
+ X
5
+ X
4
+ 1. Additional information about the Dallas 1-Wire
CRC is available in
Application Note 27
.
The shift register bits are initialized to 0. Then starting with the least significant bit of the family code, one bit at a
time is shifted in. After the 8th bit of the family code has been entered, then the serial number is entered. After the
last bit of the serial number has been entered, the shift register contains the CRC value. Shifting in the 8 bits of the
CRC returns the shift register to all 0s.
Figure 3. 64-Bit Lasered ROM
MSB
LSB
8-Bit
CRC Code
48-Bit Serial Number
8-Bit Family
Code (2Dh)
MSB
LSB
MSB
LSB
MSB
LSB
Figure 4. 1-Wire CRC Generator
X
0
X
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
Polynomial = X
8
+ X
5
+ X
4
+ 1
1
st
STAGE
2
nd
STAGE
3
rd
STAGE
4
th
STAGE
6
th
STAGE
5
th
STAGE
7
th
STAGE
8
th
STAGE
INPUT DATA
相关PDF资料 |
PDF描述 |
|---|---|
| DS2431X | The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each |
| DS2441 | 1-Cell Li-Ion Battery Manager |
| DS2450 | 1-Wire Quad A/D Converter |
| DS2450S | 1-Wire Quad A/D Converter |
| DS2480 | Serial 1.Wire Line Driver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2431P R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM |
| DS2431P T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM |
| DS2431P/R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1024-Bit 1-Wire EEPROM |
| DS2431P/T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1024-Bit 1-Wire EEPROM |
| DS2431P/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 |
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