SH7763 Datasheet, PDF (1394/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 31 Multimedia Card Interface (MMCIF)
(3) Operation of Commands Not Requiring Command Response
Some broadcast commands do not require a command response.
Figure 31.2 shows an example of the command sequence for commands that do not require a
command response.
Figure 31.3 shows the operational flow for commands that do not require a command response.
• Create settings to issue the command.
• Set the START bit in CMDSTRT to 1 to start command transmission.
• The end of the command sequence is detected by poling the BUSY flag in CSTR or through
the command output end interrupt (CMDI).
Input/output pins
CLK
CMD
DAT
CMDSTRT
(START)
INTSTR0
(CMDI)
CSTR
(CWRE)
(BUSY)
(REQ)
Command output (48 bits)
Command transmission
started
Command transmission
ended
Command transmission period
Command sequence period
Figure 31.2 Example of Command Sequence for Commands
Not Requiring Command Response
Rev. 1.00 Oct. 01, 2007 Page 1328 of 1956
REJ09B0256-0100