參數(shù)資料
型號(hào)： DS2432
元件分類： DRAM
英文描述： 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
中文描述： 1Kb、保護(hù)型1-Wire EEPROM，帶有SHA-1引擎
文件頁數(shù)： 17/30頁
文件大小： 165K
代理商： DS2432
PRELIMINARY
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).
DS2432
17 of 30
SHA-1 Input Data for Copy Scratchpad Command
Table 3
M0[31:24] = (SS+0)
M1[31:24] = (PP+0)
M2[31:24] = (PP+4)
M3[31:24] = (PP+8)
M4[31:24] = (PP+12)
M5[31:24] = (PP+16)
M6[31:24] = (PP+20)
M7[31:24] = (PP+24)
M8[31:24] = (SP+0)
M9[31:24] = (SP+4)
M10[31:24] = MP
M11[31:24] = SN2
M12[31:24] = (SS+4)
M13[31:24] = FFh
M14[31:24] = 00h
M15[31:24] = 00h
M0[23:16] = (SS+1)
M1[23:16] = (PP+1)
M2[23:16] = (PP+5)
M3[23:16] = (PP+9)
M4[23:16] = (PP+13)
M5[23:16] = (PP+17)
M6[23:16] = (PP+21)
M7[23:16] = (PP+25)
M8[23:16] = (SP+1)
M9[23:16] = (SP+5)
M10[23:16] = FAMC
M11[23:16] = SN3
M12[23:16] = (SS+5)
M13[23:16] = FFh
M14[23:16] = 00h
M15[23:16] = 00h
M0[15:8] = (SS+2)
M1[15:8] = (PP+2)
M2[15:8] = (PP+6)
M3[15:8] = (PP+10)
M4[15:8] = (PP+14)
M5[15:8] = (PP+18)
M6[15:8] = (PP+22)
M7[15:8] = (PP+26)
M8[15:8] = (SP+2)
M9[15:8] = (SP+6)
M10[15:8] = SN0
M11[15:8] = SN4
M12[15:8] = (SS+6)
M13[15:8] = FFh
M14[15:8] = 00h
M15[15:8] = 01h
M0[7:0] = (SS+3)
M1[7:0] = (PP+3)
M2[7:0] = (PP+7)
M3[7:0] = (PP+11)
M4[7:0] = (PP+15)
M5[7:0] = (PP+19)
M6[7:0] = (PP+23)
M7[7:0] = (PP+27)
M8[7:0] = (SP+3)
M9[7:0] = (SP+7)
M10[7:0] = SN1
M11[7:0] = SN5
M12[7:0] = (SS+7)
M13[7:0] = 80h
M14[7:0] = 00h
M15[7:0] = B8h
Legend
Mt
Input buffer of SHA engine
0
≤
t
≤
15; 32-bit words
Starting address of secret (80h)
Starting address of memory page
See Memory Map, memory pages 0 through 3
Byte n of scratchpad
MP[7:4] = 0000 for Copy Scratchpad
MP[3:0] = T8:T5 (equivalent to page number in hex)
Family Code = 33h
Serial number of device
SN0 = least significant byte, SN5 = most significant byte.
The CRC is not used
SS
PP
(SP+n)
MP
FAMC
SNx
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
, 6
th
and 7
th
byte. Alternatively, the master can accept the data
相關(guān)PDF資料
PDF描述
DS2432P 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
DS2432X 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
DS2432 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine(1K 位具有寫保護(hù)的1線EEPROM（帶SHA-1引擎）)
DS2433 4k-Bit 1-Wire EEPROM
DS2433-Z01 4K-Bit 1-Wire EEPROM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2432_12 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 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 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(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
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