Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK データシート
製品コード
AT91SAM9M10-G45-EK
886
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
39.5.19
DMA Preview Control Register
Name:
DMA_P_CTRL
Access:
Read-write
Reset Value:
0x00000000
• P_FETCH: Descriptor Fetch Control Field
0: Preview channel fetch operation is disabled.
1: Preview channel fetch operation is enabled.
• P_WB: Descriptor Writeback Control Field
0: Preview channel writeback operation is disabled.
1: Preview channel writeback operation is enabled.
• P_IEN: Transfer Done Flag Control
0: Preview Transfer done flag generation is enabled.
1: Preview Transfer done flag generation is disabled.
• P_DONE: (This field is only updated in the memory.)
0: The transfer related to this descriptor has not been performed.
1: The transfer related to this descriptor has completed. This field is updated in memory at the end of the transfer, when
writeback operation is enabled.
writeback operation is enabled.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
–
–
–
P_DONE
P_IEN
P_WB
P_FETCH