参数资料
| 型号： | DS2502P-E64+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/4页 |
| 文件大小： | 0K |
| 描述： | IC OTP 1KBIT 6TSOC |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 120 |
| 格式 - 存储器： | EPROM（带 MAC 地址） |
| 存储器类型： | EPROM OTP |
| 存储容量： | 1K（1K x 1） |
| 接口： | 1 线 串行 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 6-LSOJ |
| 供应商设备封装： | 6-TSOC |
| 包装： | 管件 |
| 产品目录页面： | 1432 (CN2011-ZH PDF) |
DS2502-E64
The first 32 bytes of the DS2502-E64’s EPROM memory contain a globally unique 64-bit node address
(EUI-64) and are write-protected. The data structure follows the conventions of UniqueWare devices
using Default Data Structure (Figure 1). This format is also known as UDP (universal data packet) and is
commonly used in 1-Wire APIs. Therefore, if using one of those APIs one can call a high level function
to read and verify the inverted CRC16. The UDP is defined in Application Note 114, 1-Wire File
Structure , and the APIs can be found in the 1-Wire Software Development Kits .
Figure 1. EUI-64 NODE ADDRESS CHIP DATA STRUCTURE
(UNUSED)
CRC16
COMPANY ID VALUE
EXTENSION ID VALUE
PROJECT ID
LENGTH
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
17 BYTES
FFh
2 BYTES
3 BYTES CONSTANT
006035h
5 BYTES SERIALIZATION
4 BYTES CONSTANT
00001128h
1 BYTE
0Ch
HIGH ADDRESS
LOW ADDRESS
The data record starts with a length byte (0Ch) and the 4-byte UniqueWare Project ID 00001128h. The
next eight bytes contain the EUI-64 global identifier (node address) which consists of an incrementing
40-bit extension identifier and the IEEE-assigned 24-bit company ID value 006035h. An inverted 16-bit
CRC ends the data record. The remaining bytes of the 32-byte memory page remain unprogrammed.
Neither the 40–bit extension identifier nor the 24-bit company ID are related to the 64-bit ROM
registration number. The ROM registration number is used to provide a unique address to access the
DS2502-E64 when multidropped on a 1-Wire bus.
EXAMPLE
Assume that a manufacturer’s company ID value is 006035h and the 40-bit extension identifier is
234567ABCDh. The EUI-64 value generated from these two numbers is 006035234567ABCDh, whose
byte and bit representations are illustrated in Figure 2.
Figure 2. SAMPLE EUI-64 VALUE
MOST SIGNIFICANTBYTE
LEAST SIGNIFICANTBYTE
00
0000 0000
60
0110 0000
35
0011 0101
23
0010 0011
45
0100 0101
67
0110 0111
AB
1010 1011
CD
1100 1101
HEX
BINARY
MOST SIGNIFICANT BIT
LEAST SIGNIFICANT BIT
This information is stored in the DS2502-E64 as 64-bit number with the least significant byte at the lower
address. Including the length byte and the inverted CRC, the complete set of data is shown in Figure 3.
Figure 3. PHYSICAL ADDRESS AND DATA MAPPING INSIDE THE DEVICE
ADDRESS
DATA
0E
3E
0D
FF
0C
00
0B
60
0A
35
09
23
08
45
07
67
06
AB
05
CD
04
00
03
00
02
11
01
28
00
0C
2 of 4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2502P-E64+ | 功能描述:可擦除可编程ROM 1Kb Add-Only Memory RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92 |
| DS2502PU-112F+T | 功能描述:可擦除可编程ROM RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92 |
| DS2502PU-1176+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS2502PU-1186+T | 制造商:Maxim Integrated Products 功能描述:DS2502 1KB ADD-ONLY MEMORY - Tape and Reel |
| DS2502P-UNW | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:UniqueWare Add-Only Memory |
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