參數(shù)資料
型號(hào)： DS1963S
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： Memory IC:Other
英文描述： SPECIALTY MEMORY CIRCUIT, MEDB2
封裝： MICROCAN-2
文件頁(yè)數(shù)： 16/37頁(yè)
文件大?。?/td> 349K
代理商： DS1963S
DS1963S
23 of 37
Device Flag Summary Table 3
Command, Function or Condition
HIDE
CHLG
AUTH
MATCH
Return to Probe Condition
SET
-----
Read Memory Command
-----
CLEARED
-----
Match Scratchpad Command
-----
CLEARED
Note 1)
Write Scratchpad Command
-----
CLEARED
-----
Read Scratchpad Command
-----
Erase Scratchpad Command
CLEARED
-----
Copy Scratchpad Command
-----
CLEARED
-----
Read Authenticated Page Command
-----
CLEARED
-----
Validate Data Page Function
SET
CLEARED
-----
Sign Data Page Function
-----
CLEARED
-----
Compute Challenge Function
-----
SET
CLEARED
Authenticate Host Function
SET
CLEARED
Note 2)
CLEARED
Compute first Secret Function
SET
CLEARED
Compute next Secret Function
SET
CLEARED
1) The flag is SET if the data matches and the AUTH flag was set before command execution;
otherwise the flag is CLEARED. Setting the MATCH flag requires the successful execution of
Compute Challenge, Authenticate Host and Match Scratchpad in an uninterrupted sequence.
2) Is SET only if CHLG flag was set before command execution; otherwise is cleared.
SHA-1 COMPUTATION ALGORITHM
This description of the SHA computation is adapted from the Secure Hash Standard SHA-1 document
referenced on page 2 of this data sheet. The algorithm takes as its input data 16, 32-bit words Mt (0 t
15), as shown in Table 2, SHA-1 Input Message Formats. The SHA computation involves a sequence of
eighty 32-bit words called Wt (0 t 79), a sequence of eighty 32-bit words called Kt (0 t 79), a
Boolean function ft (B, C, D) (0 t 79) with B, C and D being 32-bit words, and three more 32-bit
words called A, E and TMP. The operations required for the SHA computation are arithmetic addition
without carry (“+”), logical inversion or 1’s complement (“\”), EXCLUSIVE OR (“
”), logical AND
(“
”), logical OR (“”), assignment (“:=”), and circular shifting within a 32-bit word. The expression
“Sn(X)” represents a circular shift of X by n positions to the left, with X being a 32-bit word.
The function ft is defined as follows:
ft(B,C,D) = (B C) ((B\) D)
(0
t 19)
B
C D
(20
t 39)
(B
C) (B D) (C D)
(40
t 59)
B
C D
(60
t 79)
The sequence Wt (0 t 79) is defined as follows:
Wt := Mt
(0
t 15)
S1(Wt-3 Wt-8 Wt-14 Wt-16)
(16
t 79)
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參數(shù)描述
DS1963S+F5 制造商:Maxim Integrated Products 功能描述:SHA IBTN 8SOIC - Rail/Tube
DS1963S-F5 功能描述:iButton RoHS:否 存儲(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1963S-F5+ 功能描述:iButton SHA iButton RoHS:否 存儲(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1965S-1-F3 功能描述:iButton RoHS:否 存儲(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1965S-1-F5 功能描述:iButton RoHS:否 存儲(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
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