r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1263

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

Figure 24.19 Example of Operational Flow for Commands with Write Data
No
No
No
No
No
(Set CMDR then CMDSTRT)
Start of command sequence
End of command sequence
Read response register
for transfer in TBCR
Set the size of block
Cap × n (FEI) ≥ Len
DTBUSY detected?
Write data to FIFO
CRCERI interrupt
CRCERI interrupt
Response status
Execute CMD16
Set DATAEN to 1
Execute CMD24
DBSYI interrupt
DTERI interrupt
DRPI interrupt
CRPI interrupt
DTI interrupt
FEI interrupt
normal end?
Clear FIFO
detected?
detected?
detected?
detected?
detected?
detected?
detected?
detected?
CMD16
normal?
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
No
(Single Block Transfer)
Set CMDOFF to 1
CTERI interrupt
detected?
Rev.1.00 Jan. 10, 2008 Page 1233 of 1658
Legend:
Len:
Cap:
n (FEI): Number of FIFO empty interrupts (FEI)
Yes
24. Multimedia Card Interface (MMCIF)
Block length [bytes]
FIFO size [bytes]
from the start of read sequence
No
REJ09B0261-0100