Renesas SH7781 - Manual (Page 1277)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1247 of 1658
REJ09B0261-0100
Start of command sequence
End of command sequence
Clear FIFO
Configure the DMAC
Set DMACR (in the MMCIF)
Read response register
Set CMDOFF to 1
Execute CMD12
Set CMDOFF to 1
Clear DMACR to H'00
CRPI interrupt
detected?
No
Yes
Response status
normal?
No
Yes
DMA transfer end?
No
Yes
CTERI interrupt
detected?
No
Yes
CRCERI interrupt
detected?
Yes
No
DTERI interrupt
detected?
Yes
No
Execute CMD11
(Set CMDR then CMDSTRT)
Set CMDOFF to 1
Execute CMD12
Clear FIFO
Figure 24.24 Example of Operational Flow for Stream Read Transfer