參數(shù)資料
型號(hào)： HB28B128MM2
廠(chǎng)商： Hitachi,Ltd.
英文描述： MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
中文描述： 多媒體16 Mbyte/32 Mbyte/64 Mbyte/128字節(jié)
文件頁(yè)數(shù)： 18/88頁(yè)
文件大?。?/td> 329K
代理商： HB28B128MM2
HB28E016/D032/D064/B128MM2
18
C_SIZE_MULT
This parameter is used for coding a factor MULT for computing the total device size (refer to “C_SIZE”).
The factor MULT is defined as 2
C_SIZE_MULT+2
.
Multiply Factor for the Device Size
C_SIZE_MULT
MULT
Remark
0
2
2
= 4
1
2
3
= 8
2
2
4
= 16
3
2
5
= 32
4
2
6
= 64
5
2
7
= 128
6
2
8
= 256
7
2
9
= 512
The card capacity is shown at “C_SIZE”.
ERASE_GRP_SIZE
The contents of this register is a 5 bit binary coded value, used to calculate the size of the erasable unit of
these Hitachi MultiMediaCards. The size of the erase unit (also referred to as erase group in chapter
“Memory Array Partitioning”) is determined by the ERASE_GRP_SIZE and the ERASE_GRP_MULT
entries of the CSD, using the following equation:
size of erasable unit = (ERASE_GRP_SIZE + 1) * (ERASE_GRP_MULT + 1)
The parameter ERASE_GRP_SIZE is permanently assigned to the value ‘0’. The size of erasable unit for
these Hitachi MultiMediaCards is (0+1) * (15+1) = 16, which means that the 8 kByte area can be erased in
a single erase group command (CMD35 to CMD38).
ERASE_GRP_MULT
A 5 bit binary coded value is used for calculating the size of the erasable unit of these Hitachi
MultiMediaCards. The parameter ERASE_GRP_MULT is permanently assigned to the value 0x0F. See
ERASE_GRP_SIZE section for detailed description.
WP_GRP_SIZE
The size of a write protection group. The content of this register is a binary coded value defining the
number of erase group. This parameter's value is 1, which means that a write protect group size is 16
kByte.
相關(guān)PDF資料
PDF描述
HB28D032MM2 MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
HB28D064MM2 MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
HB28E016MM2 MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
HB28C048A6 FLASH ATA Card
HB28C048C6 CompactFlash⑩
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