SH7785 Datasheet, PDF (1278/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

24. Multimedia Card Interface (MMCIF)
Start of command sequence
Clear FIFO
Set the block size in TBCR
Execute CMD16
CMD16
No
normal end?
Yes
Set the number of blocks
for transfer in TBNCR
Execute CMD 23
CMD 23
No
normal end?
Yes
Configure the DMAC
Set DMACR (in the MMCIF)
(Specify auto mode)
Execute CMD 18
(Set CMDR then CMDSTRT)
Yes
CRCERI interrupt
detected?
No
No
CRPI interrupt
detected?
Yes
Read response register
No
Response status
normal?
Yes
1
CTERI interrupt
No
detected?
Yes
2
Figure 24.25 (1) Example of Operational Flow for Auto-mode
Pre-defined Multiple Block Read Transfer
Rev.1.00 Jan. 10, 2008 Page 1248 of 1658
REJ09B0261-0100