SH7785 Datasheet, PDF (1288/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

24. Multimedia Card Interface (MMCIF)
Start of command sequence
Clear FIFO
Execute CMD 20
(Set CMDR then CMDSTRT)
Yes
CRCERI interrupt
detected?
No
No
CRPI interrupt
detected?
Yes
Read response register
No
Response status
normal?
Yes
Configure the DMAC
Set DMACR (in the MMCIF)
No
FRDYI interrupt
detected or DMA transfer
end?
Yes
Set DATAEN to 1
No
DMA transfer end?
Yes
Clear DMACR to H'00
No
FEI interrupt
detected?
Yes
Set CMDOFF to 1
Execute CMD12
No
CTERI interrupt
detected?
Yes
Set CMDOFF to 1
End of command sequence
Figure 24.28 Example of Operational Flow for Stream Write Transfer
Rev.1.00 Jan. 10, 2008 Page 1258 of 1658
REJ09B0261-0100