24. Multimedia Card Interface (MMCIF)

Rev.1.00 Jan. 10, 2008 Page 1238 of 1658

REJ09B0261-0100

Start of command sequence
Clear FIFO
Read response register
Execute CMD20
(Set CMDR then CMDSTRT)
No
Yes
CRCERI interrupt
detected?
Yes
No
CRPI interrupt
detected?
Yes
No
Response status
normal?
Yes
No
CTERI interrupt
detected?
End of command sequence
Write data to FIFO
Set DATAEN to 1
Yes
No All data written
to FIFO?
Yes
FEI interrupt
detected?
No
Set CMDOFF to 1Set CMDOFF to 1
Execute CMD12
Figure 24.21 Example of Operational Flow for Commands with Write Data (Stream Transfer)