Renesas SH7781 User Manual

Page 1262

24. Multimedia Card Interface (MMCIF)

Rev.1.00 Jan. 10, 2008 Page 1232 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)

CMD20 (WRITE_DAT_UNTIL_STOP)

CMD12(STOP_TRANSMISSION)

OPCR

(DATAEN)

Input/output pins

Command

Command
response

Command

Stop command

execution sequence

Busy

Transfer
clock
trans-
mission
halted

Transfer
clock
transmission
resumed

Writing data to FIFO

Data
transmission
suspended

Data
transmission
resumed

Data
transmission
ended

Stream write command execution sequence

Command
response

Command
transmission
started

Write data

Figure 24.18 Example of Command Sequence for Commands with Write Data

(Stream Transfer)