- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97869 > DS2502 (DALLAS SEMICONDUCTOR) 128 X 8 OTPROM, PBCY3 PDF資料下載
參數(shù)資料
| 型號： | DS2502 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Programmable ROM |
| 英文描述： | 128 X 8 OTPROM, PBCY3 |
| 封裝： | TO-92, 3 PIN |
| 文件頁數(shù)： | 16/22頁 |
| 文件大?。?/td> | 451K |
| 代理商： | DS2502 |
DS2502
3 of 22
102199
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 DS2502 are not accessible until the ROM function
protocol has been satisfied. This protocol is described in the ROM functions 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 successfully executed, the
bus master may then provide any one of the memory function commands specific to the DS2502 (Figure
6).
The 1-Wire CRC of the lasered ROM is generated using the polynomial X
8 + X5 + X4 + 1. Figure 4
shows a hardware implementation of this CRC generator. 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, 1 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 48
th 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.
DS2502 BLOCK DIAGRAM Figure 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2505/T&R | 16K X 1 OTPROM, PBCY3 |
| DS2505P | 16K X 1 OTPROM, PDSO6 |
| DS2505P/T&R | 16K X 1 OTPROM, PDSO6 |
| DS2505 | 16K X 1 OTPROM, PBCY3 |
| DS2506S | 64K X 1 OTPROM, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2502/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1 kbit Add-Only Memory |
| DS2502/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1 kbit Add-Only Memory |
| DS2502/T&R | 制造商:Maxim Integrated Products 功能描述:IC OTP 1KBIT TO92-3 |
| DS2502/T&R/SL | 制造商:Maxim Integrated Products 功能描述:IC OTP 1KBIT TO92-3 |
| DS2502/T&R | 功能描述:可擦除可編程ROM RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。