參數(shù)資料
型號(hào)： DS2506
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： DRAM
英文描述： 64K bit Add-Only Memory(64K位只加存儲(chǔ)器)
中文描述： 64K X 1 OTPROM, PBCY3
封裝： PR-35, 3 PIN
文件頁(yè)數(shù)： 22/24頁(yè)
文件大?。?/td> 148K
代理商： DS2506
DS2506
052298 22/24
erate a 16–bit CRC that is the result of clearing the CRC
generator and then shifting in the Redirection Byte only.
When writing to the DS2506 (either data memory or sta-
tus memory), the bus master receives a 16–bit CRC to
verify the correctness of the data transfer before apply-
ing the programming pulse. With the initial pass through
the Write Memory/Status flow chart the 16–bit CRC will
be generated by clearing the CRC generator, shifting in
the command, address low, address high and the data
byte. Subsequent passes through the Write Memory/
Status flow chart due to the DS2506 automatically incre-
menting its address counter will generate an 16–bit
CRC that is the result of loading (not shifting) the new
(incremented) address into the CRC generator and then
shifting in the new data byte.
The comparison of CRC values and decision to con-
tinue with an operation are determined entirely by the
bus master. There is no circuitry on the DS2506 that pre-
vents a command sequence from proceeding if the CRC
stored in or calculated by the DS2506 does not match
the value generated by the bus master. For more details
on generating CRC values including example imple-
mentations in both hardware and software, see the
Book of DS19xx iButton Standards.
CRC-16 HARDWARE DESCRIPTION AND POLYNOMIAL
Figure 12
1ST
STAGE
2ND
STAGE
3RD
STAGE
4TH
STAGE
5TH
STAGE
6TH
STAGE
7TH
STAGE
8TH
STAGE
X
0
X
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
Polynomial = X
16
+ X
15
+ X
2
+ 1
9TH
STAGE
10TH
STAGE
11TH
STAGE
12TH
STAGE
13TH
STAGE
14TH
STAGE
15TH
STAGE
16TH
STAGE
X
9
X
10
X
11
X
12
X
13
X
14
X
15
INPUT DATA
X
16
CRC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2506+ 制造商:Maxim Integrated Products 功能描述:64-KBIT ADD-ONLY MEMORY 3PIN PR35 - Bulk
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DS2506S-UNW 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:UniqueWare Add-Only Memory
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