參數(shù)資料
型號： DS2432
廠商： Maxim Integrated Products, Inc.
元件分類： DRAM
英文描述： 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine(1K 位具有寫保護的1線EEPROM（帶SHA-1引擎）)
中文描述： 1Kb、保護型1-Wire EEPROM，帶有SHA-1引擎
文件頁數(shù)： 18/30頁
文件大?。?/td> 165K
代理商： DS2432
PRELIMINARY
that happens to reside in the scratchpad from a previous command as a challenge. The 160-bit MAC is
transmitted in the same way as with the Copy Scratchpad command, Table 2, but the data flows from the
DS2432 to the master. The data input to the SHA engine as it applies to the Read Authenticated Page
command is shown in Table 4.
DS2432
18 of 30
After the master has issued the command code and specified a valid target address it will receive the page
data beginning at the target address through the end of the data page, one byte FFh and the inverted CRC
of the command code, target address, transmitted page data and FFh byte. Immediately after the CRC is
received the master waits for 2.0
ms during which the voltage on the 1-Wire bus must not fall below
2.8V. During this time the SHA engine of the DS2432 computes the message authentication code over
the secret, all 32 data bytes of the selected page, the device’s registration number (without the CRC) and
the 3-byte challenge. Now the master reads the 160-bit MAC, which is followed by an inverted CRC as a
means to safeguard the data transfer. If the master continues reading after the CRC it will receive a
pattern of alternating 0’s and 1’s until it issues a Reset Pulse.
SHA-1 Input Data for Read Authenticated Page Command
Table 4
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] = (PP+28)
M9[31:24] = FFh
M10[31:24] = MP
M11[31:24] = SN2
M12[31:24] = (SS+4)
M13[31:24] = (SP+4)
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] = (PP+29)
M9[23:16] = FFh
M10[23:16] = FAMC
M11[23:16] = SN3
M12[23:16] = (SS+5)
M13[23:16] = (SP+5)
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] = (PP+30)
M9[15:8] = FFh
M10[15:8] = SN0
M11[15:8] = SN4
M12[15:8] = (SS+6)
M13[15:8] = (SP+6)
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] = (PP+31)
M9[7:0] = FFh
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
Family Code = 33h
MP[7:4] = 0100
MP[3:0] = T8:T5 (equivalent to page number in hex)
ROM Serial number of device
SN0 = least significant byte, SN5 = most significant byte
The CRC is not used
Byte n of Scratchpad
SS
PP
FAMC
MP
SNx
(SP+n)
相關(guān)PDF資料
PDF描述
DS2433 4k-Bit 1-Wire EEPROM
DS2433-Z01 4K-Bit 1-Wire EEPROM
DS2433S 4k-Bit 1-Wire EEPROM
DS2433T 4k-Bit 1-Wire EEPROM
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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 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
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