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Rabbit 6000 User’s Manual
digi.com
270
DMA Timed Request Control Register
(DTRCR)
(Address = 0x0115)
Bit(s)
Value
Description
7
0
Timed DMA request disabled.
1
Timed DMA request enabled.
6
These bits are reserved and should be written with zeros.
5:4
00
Timed DMA request transfers one byte per request.
01
This bit combination is reserved and should not be used.
10
Timed DMA request triggers transfers until current descriptor is
complete. DMA channel fetches the next descriptor if appropriate.
11
This bit combination is reserved and should not be used.
3:0
0000
Timed DMA request supplied to DMA Channel 0.
0001
Timed DMA request supplied to DMA Channel 1.
0010
Timed DMA request supplied to DMA Channel 2.
0011
Timed DMA request supplied to DMA Channel 3.
0100
Timed DMA request supplied to DMA Channel 4.
0101
Timed DMA request supplied to DMA Channel 5.
0110
Timed DMA request supplied to DMA Channel 6.
0111
Timed DMA request supplied to DMA Channel 7.
1000
Timed DMA request supplied to DMA Channel 8.
1001
Timed DMA request supplied to DMA Channel 9.
1010
Timed DMA request supplied to DMA Channel 10.
1011
Timed DMA request supplied to DMA Channel 11.
1100
Timed DMA request supplied to DMA Channel 12.
1101
Timed DMA request supplied to DMA Channel 13.
1110
Timed DMA request supplied to DMA Channel ‘4.
1111
Timed DMA request supplied to DMA Channel 15.
DMA Timed Request Divider Low Register
(DTRDLR)
(Address = 0x0116)
Bit(s)
Value
Description
7:0
Write
The eight LSBs of the limit value for the DMA timed request timer are
stored.
Содержание 6000
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Страница 234: ...Rabbit 6000 User s Manual digi com 234 Figure 22 3 Sample Slow A D Converter Circuit...
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Страница 420: ...Rabbit 6000 User s Manual digi com 420 Figure 37 1 Memory Read and Write Cycles...