Specifications

©Copyright 2001-2013 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 4.10
163
7.3.1.3 Detailed Command Description
The following table provides a detailed description of the SPI bus commands. The responses are
defined in Chapter 7.3.2. Table 7-3 lists all SD Memory Card commands. A "yes" in the SPI mode
column 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 SD 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.
The card shall ignore stuff bits and reserved bits in an argument.
CMD
INDEX
SPI
Mode
Argument Resp Abbreviation Command Description
CMD0
Yes
[31:0] stuff bits
R1
GO_IDLE_STATE
Resets the SD Memory Card
CMD1
Yes
1
[31]Reserved bit
[30]HCS
[29:0]Reserved
bits
R1
SEND_OP_
COND
Sends host capacity support
information and activates the card's
initialization process.
HCS is effective when card receives
SEND_IF_COND command.
Reserved bits shall be set to '0'.
CMD2
No
CMD3
No
CMD4
No
CMD5
Reserved for I/O Mode (refer to the "SDIO Card Specification")
CMD6
8
Yes
[31] Mode
0:Check function
1:Switch function
[30:24] reserved
(All '0')
[23:20] reserved
for function group
6 (All '0' or 0xF)
[19:16] reserved
for function group
5 (All '0' or 0xF)
[15:12] reserved
for function group
4 (All '0' or 0xF)
[11:8] reserved
for function group
3 (All '0' or 0xF)
[7:4] function
group 2 for
command system
[3:0] function
group 1
for access
mode
R1
SWITCH_FUNC
Checks switchable function (mode 0)
and switches card function (mode 1).
See Chapter 4.3.10.
CMD7
No