Chapter 4 – SD Card Protocol Description
Revision 2.2 SanDisk SD Card Product Manual
© 2004 SanDisk Corporation 4-39 12/08/04
Current Status
idle ready ident stby tran data rcv prg dis ina
State Change
Trigger
Changes to
CMD24 --- --- --- --- rcv --- --- --- --- ---
CMD25 --- --- --- --- rcv --- --- --- --- ---
CMD27 --- --- --- --- rcv --- --- --- --- ---
Class 6
CMD28 --- --- --- --- prg --- --- --- --- ---
CMD29 --- --- --- --- prg --- --- --- --- ---
CMD30 --- --- --- --- data --- --- --- --- ---
Class 5
CMD32 --- --- --- --- tran --- --- --- --- ---
CMD33 --- --- --- --- tran --- --- --- --- ---
CMD38 --- --- --- --- prg --- --- --- --- ---
Class 7
CMD42 --- --- --- --- rcv --- --- --- --- ---
Class 8
CMD55 idle - - stby tran data rcv prg dis -
CMC56:
RD/WR = 0
- - - - rcv - - - - -
CMD56:
RD/WR = 1
- - - - data - - - - -
ACMD6 - - - - tran - - - - -
ACMD13 - - - - data - - - - -
ACMD22 - - - - data - - - - -
ACMD18, 25,
26, 38, 43, 44,
45, 46, 47, 48,
49
Refer to the SD Card Security Specification for an explanation of the SD Security features.
The SanDisk SD Card supports all the security-related commands as explained in the
specification.
ACMD41, card
V
DD
range
compatible
ready - - - - - - - - -
ACMD41, card
busy
idle - - - - - - - - -
ACMD41, card
V
DD
range not
compatible
ina - - - - - - - - -
ACMD42 - - - - tran - - - - -
ACMD51 - - - - data - - - - -
Class 9
CMD52-
CMD54
Refer to SDIO Specification.
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