Renesas SH7781 User Manual

Page 1260

24. Multimedia Card Interface (MMCIF)

Rev.1.00 Jan. 10, 2008 Page 1230 of 1658
REJ09B0261-0100

MMCCLK

MMCCMD

MMCDAT

CMDSTRT

(CMDSTART)

INTSTR0

(CMDI)

(CMDOFF)

CSTR

(CWRE)

(BUSY)

(DTBUSY)

(DTBUSY_TU)

(REQ)

(CRPI)

(DRPI)

(DBSYI)

(DTI)

(FEI)

(FIFO_EMPTY)

CMD24 (WRITE_SINGLE_BLOCK)

OPCR

(DATAEN)

Input/output pins

Command

Command
response

Command
transmission
started

Busy

Transfer clock
transmission
halted

Transfer clock
transmission resumed

Block data
transmission
suspended

Writing data to FIFO

Write data

Block data
transmission
resumed

Single block write command execution sequence

Figure 24.16 Example of Command Sequence for Commands with Write Data

(Block Size > FIFO Size)