24. Multimedia Card Interface (MMCIF)

Rev.1.00 Jan. 10, 2008 Page 1237 of 1658

REJ09B0261-0100

No
End of command sequence
Write data to FIFO
Set DATAEN to 1
Yes
DTBUSY detected?
Yes
DBSYI interrupt
detected?
No
Yes
*
CRCERI interrupt
detected?
No
Yes

Note: * Write block size of data (if block size < or = FIFO size) or FIFO size of data (if block size > FIFO size).

Len: Block length [bytes]

Cap: FIFO size [bytes]

n (FEI): Number of FIFO empty interrupts (FEI) from the start of read sequence

n (DRPI): Number of data response interrupts (DRPI) from the start of write sequence

Legend:

DTERI interrupt
detected?
Yes
No DRPI interrupt
detected?
Yes
Cap × n (FEI)
- Len (1 + n (DRPI))
≥ Len
No
No
Yes
TBNCR = n(DRPI)?
No
Yes
BTI interrupt
detected?
No
Yes
DTI interrupt
detected?
No
Yes
FEI interrupt
detected?
No
Set CMDOFF to 1Set CMDOFF to 1
Execute CMD12

1 2

Set CMDOFF to 1
Figure 24.20 (4) Example of Operational Flow for Commands with Write Data (Pre-defined Multiple Block Transfer)