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DS1904
HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL Figure 2
Bus
Master
Command
Level
1-Wire Bus
DS1904
Available
Commands
Read ROM
Other
Devices
Data Fields
Affected
64-bit ROM
1-Wire ROM Function
Commands (see Figure 7)
DS1904 specific
Function Commands
(see Figure 5)
64-BIT LASERED ROM Figure 3
MSB
Match ROM
Search ROM
Skip ROM
Write Clock
Read Clock
64-bit ROM
64-bit ROM
N/A
RTC Counter, Device Control
RTC Counter, Device Control
LSB
8-Bit CRC Code
48-Bit Serial Number
8-Bit Family Code (24h)
MSB
LSB
MSB
LSB
MSB
LSB
1-WIRE CRC GENERATOR Figure 4
Polynomial = X 8 + X 5 + X 4 + 1
R
S
1ST
STAGE
2ND
STAGE
3RD
STAGE
4TH
STAGE
5TH
STAGE
6TH
STAGE
7TH
STAGE
8TH
STAGE
X 0
X 1
X 2
X 3
X 4
X 5
X 6
X 7
X 8
INPUT DATA
3 of 13
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相关代理商/技术参数
DS1904L-F5+
功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1920
制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Temperature iButton
DS1920+F5
制造商:Maxim Integrated Products 功能描述:TEMP IBTN 2PIN F5 MICROCAN - Rail/Tube
DS1920-F3
制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Temperature iButton
DS1920-F5
功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1920-F5+
功能描述:iButton Temperature iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921
制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:High-Resolution Thermochron iButton
DS1921G
制造商:未知厂家 制造商全称:未知厂家 功能描述:Thermochron iButton