r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1247

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

• The end of the command sequence is detected by poling the BUSY flag in CSTR, by the data
• Write the CMDOFF bit to 1 if a CRC error (CRCERI) or a command timeout error (CTERI)
• Clear the FIFO by writing the CMDOFF bit to 1, when CRC error (CRCERI) and data timeout
Input/output pins
(CMDSTART)
(FIFO_FULL)
(RD_CONTI)
transfer end interrupt (DTI) or pre-defined multiple block transfer end (BTI).
occurs in the command response reception.
error (DTERI) occurs in the read data reception.
CMDSTRT
(CMDOFF)
MMCCMD
MMCCLK
MMCDAT
INTSTR0
(CWRE)
(BUSY)
(REQ)
OPCR
(CMDI)
(CRPI)
CSTR
(FFI)
(DTI)
Figure 24.8 Example of Command Sequence for Commands with Read Data
CMD17 (READ_SINGLE_BLOCK)
Command
transmission
started
Command
(Block Size ≤ FIFO Size)
Single block read command execution sequence
Command response
Rev.1.00 Jan. 10, 2008 Page 1217 of 1658
24. Multimedia Card Interface (MMCIF)
Read data
REJ09B0261-0100