r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1272

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1242 of 1658
REJ09B0261-0100
No
No
Figure 24.22 Example of Read Sequence Flow (Single Block Transfer)
(Set CMDR then CMDSTRT)
Start of command sequence
Set DMACR (in the MMCIF)
End of command sequence
Read response register
Clear DMACR to H'00
Set the size of block
Configure the DMAC
Set DMACR to H'84
for transfer in TBCR
DMA transfer end?
CRCERI interrupt
Response status
CRCERI interrupt
Execute CMD17
Execute CMD16
DTERI interrupt
CRPI interrupt
DTI interrupt
normal end?
Clear FIFO
detected?
detected?
detected?
detected?
detected?
normal?
CMD16
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
No
Clear DMACR to H'00
Set CMDOFF to 1
Clear FIFO
Clear DMACR to H'00
Set CMDOFF to 1
CTERI interrupt
detected?
Yes
No