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參數(shù)資料
| 型號： | DS2432X |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Programmable ROM |
| 英文描述： | 1K X 1 1-WIRE SERIAL EEPROM, PBGA6 |
| 封裝： | UCSP-8 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 168K |
| 代理商： | DS2432X |
Abridged Data Sheet
DS2432
12 of 14
READ/WRITE TIMING DIAGRAM Figure 11 (continued)
Read-data Time Slot
VPULLUP
VIH MIN
VPULLUP MIN
VIL MAX
0V
tLOWR
tREC
tSLOT
MASTER *
SAMPLING
WINDOW
tSU
tRDV
tRELEASE
RESISTOR
MASTER
DS2432
*The optimal sampling point for the master is as close as possible to the end time of the tRDV period
without exceeding tRDV. For the case of a Read-one time slot, this maximizes the amount of time for the
pull-up resistor to recover the line to a high level. For a Read-zero time slot it ensures that a read will
occur before the fastest 1-Wire device releases the line (tRELEASE = 0).
CRC GENERATION
With the DS2432 there are two different types of CRCs (Cyclic Redundancy Checks). One CRC is an
8-bit type. It is computed at the factory and lasered into the most significant byte of the 64-bit ROM. The
equivalent polynomial function of this CRC is X
8
+ X
5
+ X
4
+ 1. To determine whether the ROM data has
been read without error the bus master can compute the CRC value from the first 56 bits of the 64-bit
ROM and compare it to the value read from the DS2432. This 8-bit CRC is received in the true form
(non-inverted) when reading the ROM.
The other CRC is a 16-bit type, which is used for error detection with Memory and SHA-1 function
commands. For details (including Figure 12) see the full version of the data sheet.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2432P | 1K X 1 1-WIRE SERIAL EEPROM, PDSO6 |
| DS2433 | 512 X 8 1-WIRE SERIAL EEPROM, PBCY3 |
| DS2433X | 4K X 1 1-WIRE SERIAL EEPROM, UUC2 |
| DS2433S | 512 X 8 1-WIRE SERIAL EEPROM, PDSO8 |
| DS2434S | SPECIALTY MEMORY CIRCUIT, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2432X+ | 功能描述:電可擦除可編程只讀存儲器 RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| DS2432X+U | 制造商:Maxim Integrated Products 功能描述:1-W EEPROM 1KB W/SHA-1 UCSP PARTIAL - Rail/Tube |
| DS2432X-101-4D+T | 制造商:Maxim Integrated Products 功能描述:1KB PROTECTED 1-WIRE EEPROM WITH SHA-1 ENGINE - Tape and Reel |
| DS2432X-S | 功能描述:電可擦除可編程只讀存儲器 RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| DS2432X-S+ | 制造商:Maxim Integrated Products 功能描述:1-W EEPROM 1KB W/SHA-1 UCSP 2.5K TR - Tape and Reel |
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