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參數(shù)資料
| 型號： | DS1985 |
| 英文描述： | 16-kbit Add-Only iButton |
| 中文描述： | 16K位只添加iButton® |
| 文件頁數(shù)： | 3/25頁 |
| 文件大小： | 440K |
| 代理商： | DS1985 |
DS1985
3 of 25
Figure 8. After a ROM Function Command is successfully executed, the memory functions that operate
on the EPROM portions of the DS1985 become accessible and the bus master may issue any one of the
five Memory Function Commands specific to the DS1985 to read or program the various data fields. The
protocol for these Memory Function Commands is described in Figure 5. All data is read and written least
significant bit first.
DS1985 BLOCK DIAGRAM
Figure 1
64-BIT LASERED ROM
Each DS1985 contains a unique ROM code that is 64 bits long. The first 8 bits are a 1-Wire family code.
The next 48 bits are a unique serial number. The last 8 bits are a CRC of the first 56 bits. (See Figure 3.)
The 64-bit ROM and ROM Function Control section allow the DS1985 to operate as a 1-Wire device and
follow the 1-Wire protocol detailed in the section “1-Wire Bus System.” The memory functions required
to read and program the EPROM sections of the DS1985 are not accessible until the ROM function
protocol has been satisfied. This protocol is described in the ROM functions flow chart (Figure 8). The 1-
Wire bus master must first provide one of four ROM function commands: 1) Read ROM, 2) Match ROM,
3) Search ROM, or 4) Skip ROM. After a ROM function sequence has been successfully executed, the
bus master may then provide any one of the memory function commands specific to the DS1985 (Figure
5).
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 存儲類型:SRAM 存儲容量: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 存儲類型:SRAM 存儲容量: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 存儲類型:SRAM 存儲容量: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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