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參數資料
型號: MC4GH01GNMCA-2SA00
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: SAMSUNG MultiMediaCard
中文描述: 三星多媒體
文件頁數: 55/102頁
文件大小: 1384K
代理商: MC4GH01GNMCA-2SA00
MultiMediaCard
TM
55
Sep.22.2005
Revision 0.3
CRC16
The CRC16 is used for payload protection in block transfer mode. The CRC check sum is a 16-bit value and is computed
as follows:
x
16
x
12
+
=
x
n
second bit
(
)
+
×
=
x
16
(
[
=
Generator polynomial
All CRC registers are initialized to zero. The first bit is the first data bit of the corresponding block. The degree
n
of the
polynomial denotes the number of bits of the data block decreased by one (e.g. n = 4095 for a block length of 512 bytes).
The generator polynomial
is a standard CCITT polynomial. The code has a minimal distance d=4 and is used for a
payload length of up to 2048 Bytes (n <= 16383).
The same CRC16 calculation is used for all bus configurations. In 4 bit and 8 bit bus configurations, the CRC16 is calcu-
lated for each line separately. Sending the CRC is synchronized so the CRC code is transferred at the same time in all
lines.
Figure 6-4 : CRC16 Generator/Checker
G x
x
5
x
n
1
+
+
M x
first bit
(
)
1
last bit
(
)
x
0
×
+
+
×
CRC
15
0
[
]
Remainder
M x
)
G x
]
G x
data in
data out
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相關代理商/技術參數
參數描述
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