Section 14 Direct Memory Access Controller (DMAC)
Rev.1.00 Dec. 13, 2005 Page 578 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Descriptions
11 to 8
RS[3:0]
0000
R/W
Resource Select 3 to 0
Specify which transfer requests will be sent to the
DMAC. The changing of transfer request source should
be done in the state that the DMA enable bit (DE) is
cleared to 0.
0000: External request, dual address mode
0100: Auto request
1000: Selected by DMA extended resource selector (for
peripheral modules)
Other than above: Setting prohibited
Note: External request specification is valid only in
CHCR0 to CHCR3. None of the external request
can be selected in CHCR4 to CHCR11. DMA
extended resource selector is valid only in
CHCR0 to CHCR5).
7
6
DL
DS
0
0
R/W
R/W
DREQ Level and DREQ Edge Select
Specify the detecting method of the DREQ pin input
and the detecting level.
These bits are valid only in CHCR0 to CHCR3.
In channels 0 to 3, also, if the transfer request source is
specified as a peripheral module or if an auto-request is
specified, these bits are invalid.
00: DREQ detected in low level (
DREQ
)
01: DREQ detected at falling edge
10: DREQ detected in high level
11: DREQ detected at rising edge
5
TB
0
R/W
Transfer Bus Mode
Specifies the bus mode when DMA transfers data.
0: Cycle steal mode
1: Burst mode
Select the cycle steal mode when the peripheral module
requests.
4, 3
TS[1:0]
00
R/W
DMA Transfer Size Specify
See the description of TS2 (bit 20).
Содержание SH7780 Series
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Страница 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Страница 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
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 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
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Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Страница 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
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