r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1209
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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Part Number:
r8a77850anbgV
Manufacturer:
Renesas Electronics America
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24.3.3
OPCR is an 8-bit readable/writable register that aborts command operation, and suspends or
continues data transfer.
Bit
7 to 1
0
Bit
7
Operation Control Register (OPCR)
Bit Name
—
CMDSTART 0
Bit Name
CMDOFF
Initial value:
Initial value:
Initial
Value
All 0
Initial
Value
0
R/W:
R/W:
Bit:
Bit:
CMD
OFF
R/W
⎯
7
0
R
7
0
R/W
R
R/W
R/W
R/W
⎯
⎯
R
R
6
0
6
0
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Starts command transmission when 1 is written. This bit
is automatically cleared to 0 after the MMCIF received
the CMDSTART command. When 0 is written to this bit,
operation is not affected.
Description
Command Off
Aborts all command operations (MMCIF command
sequence) when 1 is written after a command is
transmitted. This bit is cleared to 0 automatically after
the MMCIF received the CMDOFF command.
Write enabled period: From command transmission
completion to command sequence end
Write of 0: Operation is not affected.
Write of 1: Command sequence is forcibly aborted.
Note: Do not write to this bit out of the write enable
CONTI
R/W
RD_
⎯
R
5
0
5
0
DATAEN
period.
R/W
⎯
R
4
0
4
0
⎯
⎯
R
R
3
0
3
0
Rev.1.00 Jan. 10, 2008 Page 1179 of 1658
⎯
⎯
R
2
0
2
0
R
24. Multimedia Card Interface (MMCIF)
⎯
⎯
R
R
1
0
1
0
START
R/W
CMD
⎯
R
0
0
0
0
REJ09B0261-0100
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