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參數(shù)資料
| 型號(hào)： | DS1985 |
| 英文描述： | 16-kbit Add-Only iButton |
| 中文描述： | 16K位只添加iButton® |
| 文件頁(yè)數(shù)： | 4/25頁(yè) |
| 文件大?。?/td> | 440K |
| 代理商： | DS1985 |
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DS1985
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The 1-Wire CRC of the lasered ROM is generated using the polynomial X
8
+ X
5
+ X
4
+ 1. Additional
information about the Dallas Semiconductor 1-Wire Cyclic Redundancy Check is available in the Book
of DS19xx iButton Standards. The shift register acting as the CRC accumulator is 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 48th bit of the serial number
has been entered, the shift register contains the CRC value. Shifting in the 8 bits of CRC should return the
shift register to all 0s.
HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL
Figure 2
64-BIT LASERED ROM
Figure 3
8-Bit CRC Code
48- Bit Serial Number
8-Bit Family Code (0BH)
MSB
LSB MSB
LSB MSB
LSB
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1985-F5 | 16-kbit Add-Only iButton |
| DS1985-F3 | 16-kbit Add-Only iButton |
| DS1990P | Analog IC |
| DS1990R | Analog IC |
| DS1991L | Analog IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1985+F3 | 制造商:Maxim Integrated Products 功能描述:ADD-O IBTN 16KB, F3 (GENERIC) LFREE - Rail/Tube |
| DS1985+F5 | 制造商:Maxim Integrated Products 功能描述:ADD-O IBTN 16KB, F5 (GENERIC) LFREE - Rail/Tube |
| DS1985-F3 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1985-F3# | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1985-F3+ | 功能描述:iButton 16Kb Add-Only iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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