ISD94100 Series Technical Reference Manual
Sep 9, 2019
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OPMODE
PDMA Operation Mode Selection
00 = Idle state: Channel is stopped or this table is complete, when PDMA finish channel
table task, OPMODE will be cleared to idle state automatically.
01 = Basic mode: The descriptor table only has one task. When this task is finished, the
PDMA_INTSTS[n] will be asserted.
10 = Scatter-Gather mode: When operating in this mode, user must give the next descriptor
table address in PDMA_DSCT_NEXT register; PDMA controller will ignore this task, then
load the next task to execute.
11 = Reserved. Do not use.
Note:
Before filling transfer task in the Descriptor Table, user must check if the descriptor
table is complete.
Note:
The reset value of this field will be different every time powered chip.