Datasheet

921
SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
38.5.19 DMA Preview Control Register
Name: DMA_P_CTRL
Access: Read/Write
• 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.
31 30 29 28 27 26 25 24
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76543210
––––P_DONEP_IENP_WBP_FETCH