Renesas SH7781 - Manual (Page 1268)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1238 of 1658
REJ09B0261-0100
Start of command sequence
Clear FIFO
Read response register
Execute CMD20
(Set CMDR then CMDSTRT)
No
Yes
CRCERI interrupt
detected?
Yes
No
CRPI interrupt
detected?
Yes
No
Response status
normal?
Yes
No
CTERI interrupt
detected?
End of command sequence
Write data to FIFO
Set DATAEN to 1
Yes
No
All data written
to FIFO?
Yes
FEI interrupt
detected?
No
Set CMDOFF to 1 Set CMDOFF to 1
Execute CMD12
Figure 24.21 Example of Operational Flow for Commands with Write Data
(Stream Transfer)