Section 24 Multimedia Card Interface (MMCIF)
Rev.1.00 Dec. 13, 2005 Page 873 of 1286
REJ09B0158-0100
24.3.3 Operation
Control Register (OPCR)
OPCR is an 8-bit readable/writable register that aborts command operation, and suspends or
continues data transfer.
Bit:
Initial value:
R/W:
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R/W
DATAEN
RD_
CONTI
CMD
OFF
R
R/W
R/W
R
R
R
R
Bit Bit
Name
Initial
Value R/W Description
7 CMDOFF
0 R/W
Command
Off
Aborts all command operations (MMCIF command
sequence) when 1 is written after a command is
transmitted. This bit is cleared 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
period.
6 —
0 R
Reserved
This bit is always read as 0. The write value should
always be 0.
5 RD_CONTI
0 R/W
Read
Continue
Read data reception is resumed when 1 is written while
the sequence has been halted by FIFO full or
termination of block reading in multiple block read.
This bit is cleared automatically when 1 is written and
the MMCIF received the RD_CONTI command.
Write enabled period: While read data reception is
halted
Write of 0: Operation is not affected.
Write of 1: Resumes read data reception.
Note: Do not write to this bit out of the write enable
period.
Содержание SH7780 Series
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Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
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Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
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Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
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