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參數(shù)資料
| 型號(hào)： | DS1982 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | UniqueWare iButton(UniqueWare iButton標(biāo)準(zhǔn)的EPROM) |
| 中文描述： | 1K位只添加iButton® |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 139K |
| 代理商： | DS1982 |
PARASITE POWER
1–WIRE FUNCTION
CONTROL
64–BIT LASERED
ROM
PROGRAM
VOLTAGE
DETECT
MEMORY
FUNCTION
CONTROL
8–BIT
SCRATCHPAD
8–BIT CRC
GENERATOR
1024–BIT EPROM
(4 PAGES OF 32 BYTES)
EPROM STATUS
BYTES
DATA
1–WIRE
BUS
DS1982
062598 3/21
and program the EPROM sections of the DS1982 are
not accessible until the ROM function protocol has been
satisfied. This protocol is described in the ROM func-
tions flow chart (Figure 9). 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 suc-
cessfully executed, the bus master may then provide
any one of the memory function commands specific to
the DS1982 (Figure 6).
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 Redun-
dancy Check is available in the Book of DS19xx iButton
Standards. The shift register acting as the CRC accu-
mulator 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 zeroes.
DS1982 BLOCK DIAGRAM
Figure 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1985 | UniqueWare iButton(唯一貨品按鈕) |
| DS1986U | UniqueWare iButton(唯一貨品按鈕) |
| DS1986 | 64K bit Add-Only iButton(64K位只加按鈕) |
| DS2045W | 3.3V Single-Piece 1Mb Nonvolatile SRAM |
| DS2045W-100 | 3.3V Single-Piece 1Mb Nonvolatile SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1982+F3 | 制造商:Maxim Integrated Products 功能描述:1KB ADD-ONLY IBTN 2PIN F3 MICROCAN - Rail/Tube |
| DS1982+F5 | 制造商:Maxim Integrated Products 功能描述:1KB ADD-ONLY IBTN 2PIN F5 MICROCAN - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC MEMORY I BUTTON 1982 |
| DS1982-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 |
| DS1982-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 |
| DS1982-F3+ | 功能描述:iButton 1Kb 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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