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Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 406 of 982
REJ09B0023-0400
•
Transfer request acknowledge and transfer end signals: Active levels for
DACK
and
TEND
can be set independently.
Figure 13.1 shows the block diagram of the DMAC.
On-chip
peripheral module
DMA transfer request signal
DMA transfer acknowledge signal
Peripheral bus
Internal bus
External ROM
X/Y memory
Interrupt controller
DREQ0
,
DREQ1
DEIn
DACK0
,
DACK1
TEND
External RAM
Bus
interface
Bus state
controller
External device
(memory mapped)
External device
(with acknowledge-
ment)
Request
priority
control
Start-up
control
Register
control
Iteration
control
SAR_n
DAR_n
DMATCR_n
CHCR_n
DMAOR
DMARS0,1
[Legend]
SAR_n:
DAR_n:
DMATCR_n:
CHCR_n:
DMAOR:
DMARS0,1:
DEIn:
n:
DMA source address register
DMA destination address register
DMA transfer count register
DMA channel control register
DMA operation register
DMA extension resource selector
DMA transfer end interrupt request to the CPU
0, 1, 2, 3
DMAC module
Figure 13.1 Block Diagram of the DMAC
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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Страница 1036: ...SH7641 Hardware Manual...