Renesas SH7781 - Manual (Page 1287)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1257 of 1658
REJ09B0261-0100
End of command sequence
Set DATAEN to 1
DRPI interrupt
detected?
No
Yes
DBSYI interrupt
detected?
No
Yes
CRCERI
or WRERI interrupt
detected?
Yes
No
No
DTERI interrupt
detected?
Yes
No
BTI interrupt
detected?
No
Yes
TBNCR = n (DRPI)?
No
Yes
DTBUSY detected?
No
Yes
FRDYI interrupt
detected or DMA transfer
end?
No
Yes
Clear DMACR to H'00
DMA transfer end?
Yes
DTI interrupt
detected?
No
Yes
1 2
Set CMDOFF to 1
Clear FIFO
Clear DMACR to H'00
Execute CMD12 or Stop Tran
Set CMDOFF to 1
Set CMDOFF to 1
Legend:
n (DRPI): Number of data response interrupts (DRPI) from the start of write sequence
Figure 24.27 (4) Example of Write Sequence Flow (Pre-defined Multiple Block Transfer)