r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1396

• 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)
• If the card returns no command response, the command response is detected through the
• The end of the command sequence is detected by poling the BUSY flag in CSTR or through
• Check whether the state is data busy or not through the DTBUSY_TU bit in CSTR. If data
• Write the CMDOFF bit to 1 when a CRC error (CRCERI) or command timeout error (CTERI)
Rev. 1.00 Oct. 01, 2007 Page 1330 of 1956
REJ09B0256-0100
Input/output pins
( DTBUSY_TU )
command timeout error (CTERI).
the command response receive end interrupt (CRPI).
busy is detected, the end of data busy state is detected through the data busy end interrupt
(DBSYI).
occurs.
CMDSTRT
(DTBUSY)
INTSTR0
(START)
(CWRE)
Figure 31.4 Example of Command Sequence for Commands without Data Transfer
(DBSYI)
(BUSY)
(CMDI)
(CRPI)
(REQ)
CSTR
CMD
CLK
DAT
Command transmission period
Command transmission
Command output (48 bits)
started
(No Data Busy State)
Command sequence execution period
Command response
reception
Response reception
(No busy state)
completed