SH7720 Datasheet, PDF (1143/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 31 MultiMediaCard Interface (MMCIF)
Input/output pins
CLK
CMD
CMD20 (WRITE_DAT_UNTIL_STOP)
Command
Command
response
DAT
CMDSTRT
(START)
OPCR
(DATAEN)
Command
transmission
started
Transfer Transfer
clock
clock
transmission transmission
halted
resumed
Data
Data
transmission transmission
suspended resumed
Write data
Write data
Write data
Transfer Transfer
clock
clock
transmission transmission
halted
resumed
CMD12(STOP_TRANSMISSION)
Command
Command
response
Data
transmission
suspended
Busy
Writing data to FIFO
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 31.18 Example of Command Sequence for Commands with Write Data
(Stream Transfer)
Rev. 3.00 Jan. 18, 2008 Page 1081 of 1458
REJ09B0033-0300