參數(shù)資料
型號(hào)： DS2432P
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Programmable ROM
英文描述： 1K X 1 1-WIRE SERIAL EEPROM, PDSO6
封裝： 0.150 INCH, TSOC-6
文件頁(yè)數(shù)： 23/30頁(yè)
文件大?。?/td> 165K
代理商： DS2432P
PRELIMINARY
DS2432
3 of 30
64-BIT LASERED ROM
Each DS2432 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 1-Wire CRC is generated using a polynomial generator consisting of a shift register and
XOR gates as shown in Figure 4. The polynomial is X
8 + X5 + X4 + 1. Additional information about the
Dallas 1-Wire Cyclic Redundancy Check is available in the Book of DS19xx iButton Standards from
Dallas Semiconductor. The shift register bits are initialized to zero. Then starting with the least significant
bit of the family code, one bit at a time is shifted in. After the 8
th 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 eight bits of CRC should return the shift register to all zeros.
HIERARCHCAL STRUCTURE FOR 1-WIRE PROTOCOL Figure 2
1-Wire net
Other
Devices
BUS
Master
DS2432
Available
Commands:
Command
Level:
Data Field
Affected:
1-Wire ROM Function
Commands (see Figure 9)
DS2432-specific
Memory Function
Commands (see Figure 7)
Read ROM
Match ROM
Search ROM
Skip ROM
Resume
Overdrive Skip
Overdrive Match
64-bit Reg. #, RC-Flag
RC-Flag
64-bit Reg. #, RC-Flag, OD-Flag
Write Scratchpad
Read Scratchpad
Load First Secret
Compute Next Secret
Copy Scratchpad
Read Authenti-
cated Page
Read Memory
64-bit Scratchpad, Flags
64-bit Scratchpad
Secret, Flags
Secret, Data Memory, Scratchpad
Data Memory or Register Page,
Secret, Flags, 64-Bit Reg. #,
Data Memory, Secret, 64-bit Reg. #,
3-Byte Challenge in Scratchpad
Data Memory, Register Page, Reg. #
64-BIT LASERED ROM Figure 3
MSB
LSB
8-Bit CRC Code
48-Bit Serial Number
8-Bit Family Code (33h)
MSB
LSB
MSB
LSB
MSB
LSB
相關(guān)PDF資料
PDF描述
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
DS2434 SPECIALTY MEMORY CIRCUIT, PBCY3
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2432P R 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P T 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P/T&R 功能描述:電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
DS2432P+ 制造商:Maxim Integrated Products 功能描述:EEPROM SERL-1WIRE 1KBIT 4PAGES X 256 3.3V/5V 6PIN TSOC - Rail/Tube 制造商:Maxim Integrated Products 功能描述:1-WIRE 1KB EE W/SHA-1 TSOC PBFREE 制造商:Maxim Integrated Products 功能描述:EEPROM 1KB 1-WIRE 6TSOC 制造商:Maxim Integrated Products 功能描述:EEPROM, 1KB, 1-WIRE, 6TSOC 制造商:Maxim Integrated Products 功能描述:OPTOCOUPLERS; Memory Size:1Kbit; Memory Configuration:256 x 4; Supply Voltage Min:2.8V; Supply Voltage Max:5.25V; Memory Case Style:TSOC; No. of Pins:6; IC Interface Type:Serial; Operating Temperature Min:-40C ;RoHS Compliant: Yes
DS2432P+R 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
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