參數(shù)資料
型號： DS2432P
廠商： DALLAS SEMICONDUCTOR
元件分類： Programmable ROM
英文描述： 1K X 1 1-WIRE SERIAL EEPROM, PDSO6
封裝： 0.150 INCH, TSOC-6
文件頁數(shù)： 9/30頁
文件大?。?/td> 165K
代理商： DS2432P
PRELIMINARY
DS2432
17 of 30
Special attention is required when copying data to the register page. In order to prevent unintentional
locking of a special function register or user byte it is recommended to first read the register page and
then write it all with the intended modification to the scratchpad. When writing to the register page (or the
secret using Copy Scratchpad), the input data for M1 to M7 of the SHA engine will be the current secret
(M1, M2), the current content of the register page (M3, M4), the full 64-bit registration number (M5,
M6), and 4 bytes FFh (M7).
SHA-1 Input Data for Copy Scratchpad Command Table 3
M0[31:24] = (SS+0)
M0[23:16] = (SS+1)
M0[15:8] = (SS+2)
M0[7:0] = (SS+3)
M1[31:24] = (PP+0)
M1[23:16] = (PP+1)
M1[15:8] = (PP+2)
M1[7:0] = (PP+3)
M2[31:24] = (PP+4)
M2[23:16] = (PP+5)
M2[15:8] = (PP+6)
M2[7:0] = (PP+7)
M3[31:24] = (PP+8)
M3[23:16] = (PP+9)
M3[15:8] = (PP+10)
M3[7:0] = (PP+11)
M4[31:24] = (PP+12)
M4[23:16] = (PP+13)
M4[15:8] = (PP+14)
M4[7:0] = (PP+15)
M5[31:24] = (PP+16)
M5[23:16] = (PP+17)
M5[15:8] = (PP+18)
M5[7:0] = (PP+19)
M6[31:24] = (PP+20)
M6[23:16] = (PP+21)
M6[15:8] = (PP+22)
M6[7:0] = (PP+23)
M7[31:24] = (PP+24)
M7[23:16] = (PP+25)
M7[15:8] = (PP+26)
M7[7:0] = (PP+27)
M8[31:24] = (SP+0)
M8[23:16] = (SP+1)
M8[15:8] = (SP+2)
M8[7:0] = (SP+3)
M9[31:24] = (SP+4)
M9[23:16] = (SP+5)
M9[15:8] = (SP+6)
M9[7:0] = (SP+7)
M10[31:24] = MP
M10[23:16] = FAMC
M10[15:8] = SN0
M10[7:0] = SN1
M11[31:24] = SN2
M11[23:16] = SN3
M11[15:8] = SN4
M11[7:0] = SN5
M12[31:24] = (SS+4)
M12[23:16] = (SS+5)
M12[15:8] = (SS+6)
M12[7:0] = (SS+7)
M13[31:24] = FFh
M13[23:16] = FFh
M13[15:8] = FFh
M13[7:0] = 80h
M14[31:24] = 00h
M14[23:16] = 00h
M14[15:8] = 00h
M14[7:0] = 00h
M15[31:24] = 00h
M15[23:16] = 00h
M15[15:8] = 01h
M15[7:0] = B8h
Legend
Mt
Input buffer of SHA engine
0
≤ t ≤ 15; 32-bit words
SS
Starting address of secret (80h)
PP
Starting address of memory page
See Memory Map, memory pages 0 through 3
(SP+n)
Byte n of scratchpad
MP
MP[7:4] = 0000 for Copy Scratchpad
MP[3:0] = T8:T5 (equivalent to page number in hex)
FAMC
Family Code = 33h
SNx
Serial number of device
SN0 = least significant byte, SN5 = most significant byte.
The CRC is not used
Read Authenticated Page [A5h]
The Read Authenticated Page command provides the master with the data of a full or partial memory
page plus a message authentication code (MAC). The MAC allows the master to determine whether the
secret stored in the DS2432 is valid within the application. The DS2432 computes the MAC from its
secret, all the data of the selected memory page, its registration number and a 3-byte challenge, which the
master should write to the scratchpad prior to issuing the Read Authenticated Page command. To do this,
the master can use the write scratchpad command with any target address within the data memory. The
relevant portions of the challenge are the 5
th, 6th and 7th byte. Alternatively, the master can accept the data
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: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: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
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:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
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