參數(shù)資料
型號： MC28U016NACA
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： MultiMediaCard Specification
中文描述： 多媒體卡規(guī)格
文件頁數(shù)： 25/66頁
文件大?。?/td> 1422K
代理商： MC28U016NACA
MultiMediaCard
TM
25
= 6.0, 0xE = 7.0, 0xF = 8.0
Always ‘0’
7
Reserved
These MultiMediaCards support a transfer rate between 0 and 20Mb/s. The parameter TRAN_SPEED is
0x2A.
CCC
The MultiMediaCard command set is divided into subsets (command classes). The card command class
register CCC defines which command classes are supported by this card. A set CCC bit means that the
corresponding command class is supported. For command class definition refer to Table “ Command
Classes”.
Supported Card Command Classes
CCC bit
0
1
…..
11
These MultiMediaCards support the command classes 0,2,4,5,6 and 7. The parameter CCC is
permanently assigned to the value 0x0F5.
READ_BLK_LEN
The data block length is computed as 2^
READ_BLK_LEN
.
Data Block Length
READ_BLK_LEN
0
1
…..
11
12-15
The value of the parameter READ_BLK_LEN is 0x09 (512 bytes).
READ_BLK_PARTIAL
READ_BLK_PARTIAL defines whether partial block sizes can be used in block read command.
READ_BLK_PARTIAL = 0 means that only the block size defined by READ_BLOCK_LEN can be used
for block-orinted data transfer. READ_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).
WRITE_BLK_MISALIGN
Defines if the data block to be written by one command can be spread over more than one physical
blocks of the memory device. The size of the memory block is defined in WRITE_BLK_LEN.
Supported card command classes
Class 0
Class 1
…..
Class 11
Block length
2
0
= 1 byte
2
1
= 2 bytes
…..
2
11
= 2,048 bytes
Reserved
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