參數(shù)資料
型號(hào)： MC12U128DACA-2QC00
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： Dual Voltage MultiMediaCard Specification
中文描述： 雙電壓多媒體卡規(guī)格
文件頁(yè)數(shù)： 30/64頁(yè)
文件大小： 1385K
代理商： MC12U128DACA-2QC00
MultiMediaCard
TM
0
Start bit
1
Host
Bit5 …. Bit0
Command
Bit31 …. Bit0
Argument
Bit6 …. Bit0 1
CRC*1
End Bit
The start bit is always ‘0’ in command frames (sent from host to MultiMediaCard). The host bit is
always ‘1’ for commands. The command field contains the binary coded command number. The
argument depends on the command (refer to Table “Basic Commands (class 0) and Table “Block-
Oriented Read Commands (class 2)”). The CRC field is defined in Chapter “Cyclic Redundancy Check
(CRC)”.
The MultiMediaCard supports the following MultiMediaCard commands :
Table 4-8 Detailed Command Description
CMD
Index
Type
Argument
Resp
CMD0
bc
[31:0] stuff bits
CMD1
bcr
[31:0] OCR
without busy
Abbreviation
GO_IDLE_STATE
SEND_OP_COND
Command description
Resets all card to Idle State
Checks for cards not supporting the full
range of 2.0V to 3.6V. After receiving CMD1
the card sends an R3 response (refer to
Chapter “Responses”).
Asks all cards in ready state to send their
CID
*1
numbers
on CMD-line
Assigns relative address to the card in
identification state.
Programs the DSR of all cards in stand-by
state.
These Samsung MultiMediaCard do not
support this command.
Command toggles a card between the
standby and transfer states or between the
programming and disconnect state. In both
cases the card is selected by its own
relative address while deselecting the prior
selected card. Address 0 deselects all.
R3
CMD2
bcr
[31:0] stuff bits R2
ALL_SEND_CID
CMD3
ac
[31:16] RCA
[15:0] stuff bits
[31:16] DSR
[15:0] stuff bits
R1
SET_RELATIVE_A
DDR
SET_DSR
CMD4
bc
CMD7
ac
[31:16] RCA
[15:0] stuff bits
R1 (only
the
select
ed
card)
SELECT/
DESELECT_CARD
CMD8
CMD9
reserved
ac
[31:16] RCA
[15:0] stuff bits
[31:16] RCA
[15:0] stuff bits
[31:0] data
address
R2
SEND_CSD
Asks the addressed card to send its card-
specific data (CSD)
*2
on CMD-line.
Asks the addressed card to send its card
identification (CID) on CMD-line.
Reads data stream from the card, starting at
the given address, until a
STOP_TRANSMISSION follows.
These Samsung MultiMediaCard do not
support this command
Terminates a read/write stream/multiple
block operation. When CMD12 is used to
terminate a read transaction the card will
respond with R1. When it is used to stop a
write transaction the card will respond with
R1b.
Asks the addressed card to send its status
register.
CMD10 ac
R2
SEND_CID
CMD11
adtc
R1
READ_DAT_UNTIL
_STOP
CMD12 ac
[31:0] stuff bits R1
or
R1b
*3
STOP_TRANSMISS
ION
CMD13 ac
[31:16] RCA
[15:0] stuff bits
R1
SEND_STATUS
CMD14 reserved
CMD15 ac
[31:16] RCA
GO_INACTIVE_STA
Sets the card to inactive state in order to
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