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參數資料
| 型號： | MC28U512HACA |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | MultiMediaCard Specification |
| 中文描述： | 多媒體卡規格 |
| 文件頁數： | 29/66頁 |
| 文件大小： | 1422K |
| 代理商： | MC28U512HACA |
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MultiMediaCard
TM
29
shown in table “File_Formats”
COPY
Defines if the contents are an original (= 0) or a copy (= 1). The COPY bit is a one time programmable bit,
being set by the customer.
PERM_WRITE_PROTECT
Permanently protects the whole card content against overwriting or erasing (all write and erase
commands for this card is a permanently disabled). This parameter is one-time programmable by the
customer. The default value is ‘0’ (not protected).
TMP_WRITE_PROTECT
Temporarily protects the whole card content from being overwritten or erased (all write and erase
commands for this card are temporarily disabled). This parameter is programmable by the customer. The
default value is ‘0’ (not protected).
FILE_FORMAT
Indicates the file format on the card. This field is read-only for ROM. The following formats are defined.
FILE_FORMAT
_GRP
MAT
0
0
Hard disk-like file system with partition table
0
1
DOS FAT (floppy-like) with boot sector only (no partition table)
0
2
Universal File Format
0
3
Others/Unknown
1
0,1,2,3
Reserved
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
ECC Type
Maximum number of correctable bits
0
None (default)
None
1
BCH (542,512)
3
2-3
0,1,2,3
-
The content provider or customer defines which kind of error correction may be used to protect the
contents of MultiMediaCard. This value is programmable.
CRC7
The CRC7 contains the check sum for the CSD content. The check sum is computed according to
chapter “Cyclic Redundancy Check(CRC)”.
FILE_FOR
Type
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