MC56U032NCFA Samsung Semiconductor, Inc., MC56U032NCFA Datasheet - Page 54

• Manufacturer Part Number: MC56U032NCFA
• Description: Flash Card
• Manufacturer: Samsung Semiconductor, Inc.

CMD index
CMD0
CMD1
CMD2
CMD3
CMD4
CMD5
CMD6
CMD7
CMD8
CMD9
CMD10
CMD11
CMD12
CMD13
CMD14
CMD15
CMD16
CMD17
CMD18
CMD19
CMD20
CMD21…
CMD22
CMD23
CMD24
MultiMediaCard
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
Yes
Yes
SPI mode
Yes
Yes
No
No
No
reversed
reversed
No
reversed
Yes
Yes
No
No
Yes
reversed
No
Yes
Yes
reversed
No
reversed
Yes
Argument
None
None
None
None
None
[31:0] block length
[31:0]
[31:0]
[31:16] set to 0
[15:0] number of
[31:0]
TM
address
address
blocks
address
data
data
data
Resp
R1
R1
R1
R1
R2
R1
R1
R1
R1
R1b
*3
Abbreviation
GO_IDLE_STATE
SEND_OP_COND
SEND_CSD
SEND_CID
SEND_STATUS
SET_BLOCKLEN
READ_SINGLE_
READ_MULTIPLE
SET_BLOCK_CO
WRITE_BLOCK
BLOCK
_BLOCK
UNT
Command description
asks the selected card to send its
resets the MultiMediaCard
Activates the card’s initialization
process.
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).
reads a block of the size selected
by the SET_BLOCKLEN
command.
continuously transfers data blocks
from card to host until interrupted
by a stop command or the
requested number of data blocks
transmitted.
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
*2
*1
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