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參數(shù)資料
| 型號： | DS1986-F3 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Programmable ROM |
| 英文描述： | 64K X 1 OTPROM, MEDB2 |
| 封裝： | MICROCAN-2 |
| 文件頁數(shù)： | 22/28頁 |
| 文件大?。?/td> | 680K |
| 代理商： | DS1986-F3 |
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DS1986
3 of 28
64-BIT LASERED ROM
Each DS1986 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 64-bit ROM and ROM Function Control section allow the DS1986 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 DS1986 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 six ROM function commands: 1) Read ROM,
2) Match ROM, 3) Search ROM, or 4) Skip ROM, 5) Overdrive-Skip ROM, or 6) Overdrive-Match
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 DS1986 (Figure 5).
The 1-Wire CRC of the lasered ROM is generated using the polynomial X8 + X5 + X4 + 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 zero.
Then starting with the least significant bit of the family code, one bit at a time is shifted in. After the
eighth 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.
相關(guān)PDF資料 |
PDF描述 |
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| DS1986-F5 | 64K X 1 OTPROM, MADB2 |
| DS1991L-F5 | SPECIALTY MEMORY CIRCUIT, MEDB2 |
| DS1994L-F5 | SPECIALTY MEMORY CIRCUIT, MRDB2 |
| DS1993L-F5 | SPECIALTY MEMORY CIRCUIT, MRDB2 |
| DS1992L-F5 | SPECIALTY MEMORY CIRCUIT, MRDB2 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1986-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 |
| DS1986-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 |
| DS1986F5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EPROM|256X32X8|BUTTON|METAL |
| DS1986-F5 | 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 |
| DS1986-F5# | 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 |
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