參數資料
型號: HB288016MM1
廠商: Hitachi,Ltd.
英文描述: MultiMediaCard 16 MByte
中文描述: 多媒體16字節(jié)
文件頁數: 20/79頁
文件大小: 233K
代理商: HB288016MM1
HB288016MM1
20
ECC
Defines the ECC code that was used for storing data on the card. This field is used by the host (or
application) to decode the user data. The following table defines the field format.
ECC Type
ECC
ECC type
Maximum number of correctable bits
0
none (default)
none
1
BCH (542,512)
3
2–15
reserved
The content provider or customer defines which kind of error correction may be used to protect the contents
of the HB288016MM1. This value is programmable.
CRC
The CRC register contains the check sum for the CSD content. The check sum is computed by the
following formulas: Generator polynomial:
G(x) = x
7
+ x
3
+ 1
M(x) = CSD[127]
x
119
+...+ CSD[8]
x
0
CRC[6...0] = Remainder [(M(x)
x
7
)/G(x)]
The user has to recalculate a new CRC after defining a new CSD.
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