©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

Re-init Memory

MEM=0

Illegal Command

F8=0

Power On

Re-init IO

IO=0, MEM=0

IO=0

CMD0 CS=Low

CMD52 IO Reset

CMD8

CMD8 is required to support

High Capacity Memory.

 

Check Response

Error Response

 

Good Response

F8=1

Unusable card

 

Skip IO Initialize or IO=1

Test IO Flag

Execute IO Initialize & IO=0

CMD5 Arg=0

Get IO OCR

Illegal Command

Check Response

NF=0 or OCR invalid

 

 

 

NF>0 & OCR valid

 

Set New Voltage (if needed)

 

CMD5 Arg=WV

 

 

IORDY=0

Check Response

1sec Timeout

 

 

 

IORDY=1

 

 

IO=1

IO Initialized

 

Test MP

 

MP=0

 

 

 

 

MP=1

 

 

 

C

 

D

8

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Image 17
SDI Technologies SDIO Card manual Illegal Command F8=0