r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1271

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

• An error in a command sequence (during data reception) is detected through the CRC error
• The data remains in FIFO after the read sequence end. Set the SET[2:0] bits in DMACR to 100
• Confirm the DMA transfer end and clear the DMAEN bit in DMACR to 0.
• Set the CMDOFF bit to 1 and clear DMACR to H'00 if a CRC error (CRCERI) or a command
• Set the CMDOFF bit to 1, clear DMACR to H'00, and clear FIFO if a CRC error (CRCERI) or
Notes: 1. In multiple block transfer, when the command sequence is ended (the CMDOFF bit is
flag or data timeout flag. When these flags are detected, set the CMDOFF bit in OPCR to 1,
issue CMD12 and suspend the command sequence.
to read all data in FIFO if necessary.
timeout error (CTERI) occurs in the command response reception.
a data timeout error (DTERI) occurs in the read data reception.
2. Access from the DMAC to FIFO must be done in bytes or words.
written to 1) before command response reception (CRPI), the command response may
not be received correctly. Therefore, to receive the command response correctly, the
command sequence must be continued (set the RD_CONT bit to 1) until the command
response reception ends.
Rev.1.00 Jan. 10, 2008 Page 1241 of 1658
24. Multimedia Card Interface (MMCIF)
REJ09B0261-0100