r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1394

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 31 Multimedia Card Interface (MMCIF)
(3)
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
Rev. 1.00 Oct. 01, 2007 Page 1328 of 1956
REJ09B0256-0100
Input/output pins
CMDSTRT
INTSTR0
the command output end interrupt (CMDI).
(START)
(CWRE)
(BUSY)
(CMDI)
(REQ)
CSTR
CMD
CLK
DAT
Operation of Commands Not Requiring Command Response
Figure 31.2 Example of Command Sequence for Commands
Not Requiring Command Response
Command transmission
started
Command transmission period
Command sequence period
Command output (48 bits)
Command transmission
ended