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参数资料
| 型号： | DS2433G+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 3/23页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 4KBIT 2SFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS |
| 标准包装： | 2,500 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 4K (256 x 16) |
| 接口： | 1 线 串行 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 2-SFN |
| 供应商设备封装： | 2-SFN（6x6） |
| 包装： | 带卷 (TR) |
DS2433
Figure 1. DS2433 BLOCK DIAGRAM
64-BIT LASERED ROM
Each DS2433 contains a unique ROM code that is 64 bits long. The first eight bits are a 1-Wire family
code. The next 48 bits are a unique serial number. The last eight bits are a CRC of the first 56 bits. (See
Figure 3.) 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 Cyclic Redundancy Check is available in Application Note 27 .
The shift register bits are initialized to zero. 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 48th bit of the serial number has been entered, the shift register contains the CRC
value. Shifting in the eight bits of CRC should return the shift register to all zeros.
MEMORY
The memory map in Figure 5 shows a 32-byte page called the scratchpad and additional 32-byte pages
called memory. The DS2433 contains pages 0 through 15 that make up the 4096-bit EEPROM. The
scratch-pad is an additional page that acts as a buffer when writing to memory.
ADDRESS REGISTERS AND TRANSFER STATUS
Because of the serial data transfer, the DS2433 employs three address registers, called TA1, TA2 and E/S
(Figure 6). Registers TA1 and TA2 must be loaded with the target address to which the data will be
written or from which data will be sent to the master upon a Read command. Register E/S acts like a byte
counter and Transfer Status register. It is used to verify data integrity with write commands. Therefore,
the master only has read access to this register. The lower five bits of the E/S register indicate the address
of the last byte that has been written to the scratchpad. This address is called Ending Offset. Bit 5 of the
E/S register, called PF, is set if the number of data bits sent by the master is not an integer multiple of 8 or
if the data in the scratchpad is not valid due to a loss of power. A valid write to the scratchpad will clear
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2433S | 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 |
| DS2433S/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 |
| DS2433S/TR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| DS2433S+ | 功能描述:电可擦除可编程只读存储器 4Kb 1-Wire 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 |
| DS2433S+T&R | 制造商:Maxim Integrated Products 功能描述:EEPROM 制造商:Maxim Integrated Products 功能描述:IC EEPROM 4KBIT 8SO |
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