Product manual

Secure Digital (SD) Card Protocol Description

4.9. Card State Transition Table

Table 4-11 defines the Industrial Grade SD Card state transitions in dependency of the received command.

Table 4-11. Card State Transition Table

Current State

idle ready ident stby tran data rcv prg dis ina

Command Changes to

Class Independent

CRC error - - - - - - - - - -

command not sup ported - - - - - - - - - -

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

CMD24 - - - - rcv - - - - -

CMD25 - - - - rcv - - - - -

CMD27 - - - - rcv - - - - -

Class 6

CMD28 - - - - prg - - - - -

CMD29 - - - - prg - - - - -

CMD30 - - - - data - - - - -

Class 5