參數(shù)資料
型號(hào)： DS1963S
英文描述： SHA iButton
中文描述： SHA iButton
文件頁(yè)數(shù)： 4/37頁(yè)
文件大?。?/td> 349K
代理商： DS1963S
DS1963S
4 of 37
64-BIT LASERED ROM
Each DS1963S contains a unique ROM code that is 64 bits long. The first 8 bits are a 1-Wire family
code. The next 48 bits are a unique serial number. The last 8 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
the Dallas 1-Wire Cyclic Redundancy Check is available in the
Book of DS19xx iButton Standards
. 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 8th bit of the family code has been entered, then the serial number is
entered. After the 48th bit of the serial number has been entered, the shift register contains the CRC
value. Shifting in the 8 bits of CRC should return the shift register to all zeros.
8
+ X
5
+ X
4
+ 1. Additional information about
DS1963S BLOCK DIAGRAM
Figure 1
CRC16
Generator
256-bit
Scratchpad
Data Memory
8 Pages of
256 bits each
S
Flag and Mode
Register
SHA Function
Control Unit
Memory and
512-bit
Secure Hash
Algorithm
Engine (SHA-1)
PRNG
Counter
R
Data Memory
8 Pages of
256 bits each
8 Write-Cycle
Counters
one for each
Memory Page
8 Write-Cycle
Counters
one for each
Secret
Secrets Memory
2 Pages of
256 bits
storing 8 Secrets
of 64 bits each
DATA
Lid
Contact
1-Wire
Function Control
64-bit
Lasered ROM
Parasite-Powered
Circuitry
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相關(guān)代理商/技術(shù)參數(shù)
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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