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參數資料
| 型號： | MC2DU512HACA |
| 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： | 54/66頁 |
| 文件大小： | 1422K |
| 代理商： | MC2DU512HACA |
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MultiMediaCard
TM
54
The following table provides a detailed description of the SPI bus commands. The responses are
defined in Chapter “Responses”. The Table “Commands and Arguments” lists all MultiMediaCard
commands. A “yes” in the SPI mode colon indicates that the command is supported in SPI mode. With
these restrictions, the command class description in the CSD is still valid. If a command does not
require an argument, the value of this field should be set to zero. The reserved commands are
reserved in MultiMediaCard mode as well. The binary code of a command is defined by the mnemonic
symbol. As an example, the content of the command index field is (binary) ‘000000’ for CMD0 and
‘100111’ for CMD39.
Table 4-15 Commands and Arguments
CMD index SPI mode
CMD0
CMD1
Argument
None
None
Resp
R1
R1
Abbreviation
GO_IDLE_STATE
SEND_OP_COND
Command description
resets the MultiMediaCard
Activates the card’s initialization
process.
asks the selected card to send its
card-specific data (CSD)
asks the selected card to send its
card identification (CID)
asks the selected card to send its
status register.
selects a block length (in bytes)
for all following block commands
(read and write).
*1
reads a block of the size selected
by the SET_BLOCKLEN
command.
*2
continuously transfers data blocks
from card to host until interrupted
by a stop command or the
requested number of data blocks
transmitted.
Yes
Yes
CMD2
CMD3
CMD4
CMD5
CMD6
CMD7
CMD8
CMD9
No
No
No
reversed
reversed
No
reversed
Yes
None
R1
SEND_CSD
CMD10
Yes
None
R1
SEND_CID
CMD11
CMD12
CMD13
No
No
Yes
None
R2
SEND_STATUS
CMD14
CMD15
CMD16
reversed
No
Yes
[31:0] block length
R1
SET_BLOCKLEN
CMD17
Yes
[31:0]
address
data
R1
READ_SINGLE_
BLOCK
CMD18
Yes
[31:0]
address
data
R1
READ_MULTIPLE
_BLOCK
CMD19
CMD20
CMD21…
CMD22
CMD23
reversed
No
reversed
Yes
[31:16] set to 0
[15:0] number of
blocks
R1
SET_BLOCK_CO
UNT
Defines the number of blocks
which are going to be transferred
in the immediately exceeding
multiple block read or write
command.
writes a block of the size selected
by the SET_BLOCKLEN
CMD24
Yes
[31:0]
address
data
R1b
*3
WRITE_BLOCK
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