SanDisk SDSDB-016G-A11 - 4.9 Card State Transition

Chapter 4 – SD Card Protocol Description
Revision 2.2 SanDisk SD Card Product Manual
© 2004 SanDisk Corporation 4-38 12/08/04
ACMD Index Type Argument Resp. Abbreviation Command Description
ACMD42 ac [31:1] stuff
bits [0]
set_cd
R1 SET_CLR_CARD_DETECT Connect[1]/Disconnect[0]
the 50KOhm pull-up
resistor on CD/DAT3 (pin
1) of the card.
ACMD43
ACMD49
--- --- --- --- Reserved for SD security
applications.
ACMD51 adtc [31:0] stuff
bits
R1 SEND_SCR Reads the SD
Configuration Register
(SCR).
4.9 Card State Transition
Table 4-18 defines the SD card state-transition (dependent on the received command). The
SD Card application-specific command state-transitions can be found in Class 8.
Table 4-18 Card State Transition Table
Current Status
idle ready ident stby tran data rcv prg dis ina
State Change
Trigger
Changes to
Class
Independent
“Operation
complete”
--- --- --- --- --- --- --- tran stby ---
Class 0
CMD0 idle idle idle idle idle idle idle idle idle ---
CMD2 --- ident --- --- --- --- --- --- --- ---
CMD3 --- --- stby stby --- --- --- --- --- ---
CMD4 --- --- --- stby --- --- --- --- --- ---
CMD7, card is
addressed
--- --- --- tran --- --- --- --- prg ---
CMD7, card is
not addressed
--- --- --- stby stby stby --- dis --- ---
CMD9 --- --- --- stby --- --- --- --- --- ---
CMD10 --- --- --- stby --- --- --- --- --- ---
CMD12 --- --- --- --- --- tran prg --- --- ---
CMD13 --- --- --- stby tran data rcv prg dis ---
CMD15 --- --- --- ina ina ina ina ina ina ---
Class 2
CMD16 --- --- --- --- tran --- --- --- --- ---
CMD17 --- --- --- --- data --- --- --- --- ---
CMD18 --- --- --- --- data --- --- --- --- ---
Class 4
CMD16 see class 2