Renesas SH7781 - Manual (Page 1275)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1245 of 1658
REJ09B0261-0100
Start of command sequence
Clear FIFO
Execute CMD16
Configure the DMAC
Set DMACR (in the MMCIF)
Read response register
CMD16
normal end?
No
Yes
CRPI interrupt
detected?
No
Yes
Response status
normal?
No
Yes
CTERI interrupt
detected?
No
Yes
CRCERI interrupt
detected?
Yes
No
Set the block size in TBCR
Set the number of
blocks in TBNCR
Execute CMD 18
(Set CMDR then CMDSTRT)
Execute CMD 23
CMD 23
normal end?
No
Yes
1 2
Figure 24.23 (3) Example of Read Sequence Flow (Pre-defined Multiple Block Transfer)