SH7785 Datasheet, PDF (1262/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

24. Multimedia Card Interface (MMCIF)
Input/output pins
MMCCLK
Transfer Transfer
clock clock
trans- transmission
mission resumed
halted
CMD20 (WRITE_DAT_UNTIL_STOP)
MMCCMD
Data
Data
Command ^{Command transmission transmission}
response suspended resumed
MMCDAT
CMDSTRT
(CMDSTART)
Command
transmission
started
Write data Write data
Writing data to FIFO
OPCR
(DATAEN)
Transfer
clock
trans-
mission
halted
Transfer
clock
transmission
resumed
CMD12(STOP_TRANSMISSION)
Data
transmission
suspended
Write data
Command
Command response
Busy
Data
transmission
ended
(CMDOFF)
INTSTR0
(CMDI)
(CRPI)
(DTI)
(DRPI)
(DBSYI)
(FEI)
CSTR
(CWRE)
(BUSY)
(FIFO_EMPTY)
Stream write command execution sequence
Stop command
execution sequence
(DTBUSY)
(DTBUSY_TU)
(REQ)
Figure 24.18 Example of Command Sequence for Commands with Write Data
(Stream Transfer)
Rev.1.00 Jan. 10, 2008 Page 1232 of 1658
REJ09B0261-0100