
Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 418 of 982
REJ09B0023-0400
Bit Bit
Name
Initial
Value R/W Description
16
DME
0
R/W
DMA Master Enable
DME enables or disables DMA transfers on all
channels. If the DME bit and the DE bit corresponding
to each channel in CHCR are set to 1s, transfer is
enabled in the corresponding channel. If this bit is
cleared during transfer, transfers in all the channels
can be terminated.
Even if the DME bit is set, transfer is not enabled if the
TE bit is 1 or the DE bit is 0 in CHCR, or the NMIF bit
is 1 in DMAOR.
0: Disable DMA transfers on all channels
1: Enable DMA transfers on all channels
15 to 6
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
5
4
3
2
RC0
RC1
RC2
RC3
0
0
0
0
R/W
R/W
R/W
R/W
Round Robin Cannel Select
RC3, RC2, RC1, and RC0 select the priority level
between channels when there are transfer requests for
multiple channels simultaneously.
0: The priority level of the CHn (n: 0 to 3) is fixed.
When all RC bits is 0, the priority level is:
CH0 > CH1 > CH2 > CH3, equals with fixed mode
(mdoe7).
1: The priority level of the CHn (n: 0 to 3) is determined
by the round-robin. When all RC bits are 1, the
priority level between channels equals with round-
robin mode (mode 5).
1, 0
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Note:
*
Writing 0 is possible to clear the flag.
If DMA transfers are requested to multiple channels simultaneously, the DMAC performs
transfers according to the specified channel priority. The channel priority is determined by the
round-robin select bits (RC0, RC1, RC2, RC3) and priority mode bits (PR1 and PR0) of the
DMAOR register.
Содержание HD6417641
Страница 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Страница 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Страница 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Страница 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
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...
Страница 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
Страница 1035: ......
Страница 1036: ...SH7641 Hardware Manual...