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参数资料
| 型号： | DS2431X |
| 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： | 14/23页 |
| 文件大小： | 170K |
| 代理商： | DS2431X |
DS2431: 1024-Bit, 1-Wire EEPROM
14 of 23
Figure 8. Hardware Configuration
Open Drain
Port Pin
RX = RECEIVE
TX = TRANSMIT
100
MOSFET
V
PUP
RX
TX
TX
RX
DATA
R
PUP
2.2μA
Max.
BUS MASTER
DS2431 1-Wire PORT
TRANSACTION SEQUENCE
The protocol for accessing the DS2431 through the 1-Wire port is as follows:
!
!
!
!
Initialization
ROM Function Command
Memory Function Command
Transaction/Data
INITIALIZATION
All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence consists of a
reset pulse transmitted by the bus master followed by presence pulse(s) transmitted by the slave(s). The presence
pulse lets the bus master know that the DS2431 is on the bus and is ready to operate. For more details, see the
1-Wire Signaling
section.
1-Wire ROM FUNCTION COMMANDS
Once the bus master has detected a presence, it can issue one of the seven ROM function commands that the
DS2431 supports. All ROM function commands are 8 bits long. A list of these commands follows (refer to the flow
chart in Figure 9).
READ ROM [33h]
This command allows the bus master to read the DS2431’s 8-bit family code, unique 48-bit serial number, and 8-bit
CRC. This command can only be used if there is a single slave on the bus. If more than one slave is present on the
bus, a data collision occurs when all slaves try to transmit at the same time (open drain produces a wired-AND
result). The resultant family code and 48-bit serial number result in a mismatch of the CRC.
MATCH ROM [55h]
The Match ROM command, followed by a 64-bit ROM sequence, allows the bus master to address a specific
DS2431 on a multidrop bus. Only the DS2431 that exactly matches the 64-bit ROM sequence responds to the
following memory function command. All other slaves wait for a reset pulse. This command can be used with a
single or multiple devices on the bus.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2431X+ | 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 |
| DS2431X+S | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM |
| DS2431X+U | 功能描述:电可擦除可编程只读存储器 1024-BIT 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 |
| DS2431X-S | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM |
| DS2431X-S+ | 功能描述:电可擦除可编程只读存储器 1024-Bit 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 |
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