MC56U032NCFA Samsung Semiconductor, Inc., MC56U032NCFA Datasheet - Page 25
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MC56U032NCFA
Manufacturer Part Number
MC56U032NCFA
Description
Flash Card
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.MC56U032NCFA.pdf
(66 pages)
- Current page: 25 of 66
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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
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^
Data Block Length
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.
MultiMediaCard
7
CCC bit
0
1
…..
11
READ_BLK_LEN
0
1
…..
11
12-15
TM
Reserved
READ_BLK_LEN
.
Supported card command classes
Class 0
Class 1
…..
Class 11
Block length
2
2
…..
2
Reserved
0
1
11
= 1 byte
= 2 bytes
= 2,048 bytes
= 6.0, 0xE = 7.0, 0xF = 8.0
Always ‘0’
25
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