Renesas SH7781 - Manual (Page 1245)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1215 of 1658
REJ09B0261-0100
Start of command sequence
Set command data in
CMDR0 to CMDR4
Set command type in CMDTYR
Set command response type
in RSPTYR
Write 1 to CMDSTRT
Yes
No
CRCERI
interrupt detected?
Yes
No CRPI
interrupt detected?
Yes
No
R1b
response?
Yes
No
DTBUSY
detected?
Yes
No
Yes
No DBSYI
interrupt detected?
End of command sequence
CTERI interrupt
detected?
Write 1 to CMDOFF
Figure 24.7 Example of Operational Flow for Commands without Data Transfer