SDI Technologies SDIO Card User Manual

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

8

CMD5 Arg=0

Check Response

CMD5 Arg=WV

Check Response

C

Power On

NF=0 or OCR invalid

NF>0 & OCR valid

IORDY=0

1sec Timeout

IORDY=1

CMD8

Check Response

F8=1

F8=0

Unusable card

CMD0 CS=Low

Test IO Flag

CMD52 IO Reset

Illegal Command

Error Response

Good Response

Re-init IO

Test MP

D

IO=1

MP=1

MP=0

IO=0

IO=0, MEM=0

Illegal Command

IO Initialized

Get IO OCR

Skip IO Initialize or IO=1

Execute IO Initialize & IO=0

Set New Voltage (if needed)

Re-init Memory

MEM=0

CMD8 is required to support
High Capacity Memory.