Renesas SH7781 - Manual (Page 1276)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1246 of 1658
REJ09B0261-0100
End of command sequence
Set DMACR to H'84
Clear DMACR to H'00
Set CMDOFF to 1
Clear DMACR to H'00
Set CMDOFF to 1
DTI interrupt
detected?
No
Yes
DMA transfer end?
No
Yes
CRCERI interrupt
detected?
Yes
No
DTERI interrupt
detected?
Yes
No
BTI interrupt
detected?
No
Yes
TBNCR = n (DTI)?
No
Yes
Legend:
n (DTI): Number of data transfer end interrupts (DTI) from the start of read sequence
1 2
Set RD_CONTI to 1
Set CMDOFF to 1
Clear DMACR to H'00
Clear FIFO
Execute CMD12
Figure 24.23 (4) Example of Read Sequence Flow (Pre-defined Multiple Block Transfer)