MultiMediaCardTM
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 8, which means that a write protect group size is 128
kByte.
WP_GRP_ENABLE
The value is set to ‘1’, meaning group write protection is enabled.
DEFAULT_ECC
Set by the card manufacturer and defines the ECC code, which is recommended to use (e.g. the device
is tested for). The value is set to ‘0’, indicating that no designated ECC is recommended.
R2W_FACTOR
Defines the typical block program time as a multiple of the read access time. The following table defines
the field format.
R2W_FACTOR
Multiples of read access time
0
1
2
3
4
5
6
7
1
2 (Write half as fast as read)
4
8
16
32
64
128
This parameter value is 4 for these MultiMediaCards.
WRITE_BLK_LEN
Block length for write operation. See READ_BL_LEN for field coding.
WRITE_BLK_PARTIAL
WRITE_BLK_PARTIAL defines whether partial block sizes can be used in block wrtie commands.
WRITE_BLK_PARTIAL = 0 means that only the block size defined by WRITE_BLOCK_LEN can be used
for block-orinted data transfer. WRITE_BLK_PARTIAL = 1 means that smaller blocks can be used as
well. The minimum block size will be equal to minimum addressable unit (one byte). These
MultiMediaCards support partial block read. The parameter WRITE_BLK_PARTIAL is permanently
assigned to the value “0”.
FILE_FORMAT_GRP
Indicated the selected group of file formats. This fiels is read-only for ROM. The usage of this fiels is
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