Section 24 Multimedia Card Interface (MMCIF)
Rev.1.00 Dec. 13, 2005 Page 874 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Description
4 DATAEN
0 R/W
Data
Enable
Starts a write data transmission by a command with
write data. This bit is cleared automatically when 1 is
written and the MMCIF received the DATAEN
command. Resumes write data transmission while the
sequence has been halted by FIFO empty or
termination of block writing in multiple block write.
Write enabled period: (1) after receiving a response to a
command with write data, (2) while sequence is halted
by FIFO empty, (3) when one block writing in multiple
block write is terminated.
Write of 0: Operation is not affected.
Write of 1: Starts or resumes write data transmission.
Note: Do not write to this bit out of the write enable
period.
3 to 0
—
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
In write data transmission, the contents of the command response and data response should be
analyzed, and then transmission should be triggered. In addition, the data transmission should be
temporarily halted by FIFO full/empty, and it should be resumed when the preparation has been
completed.
In multiple block transfer, the transfer should be temporarily halted at every block break to select
either to continue to the next block or to abort the multiple block transfer command by issuing the
CMD12 command. To continue to the next block, the RD_CONTI and DATAEN bits should be
set to 1. To issue the CMD12 command, the CMDOFF bit should be set to 1 to abort the command
sequence on the MMCIF side. When using the auto-mode for a pre-defined multiple block
transfer, the setting of the RD_CONTI bit or the DATAEN bit between blocks can be omitted.
Summary of Contents for SH7780 Series
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Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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