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1041

SRC

NOTES:

1. Application has a need to copy data items from three separate locations in memory into one combined buffer.

2. Application sets up µ'0$³WDVNOLVW´LQPHPRU\, which contains the pointers and control configuration for three

µ'0$FRS\³WDVNV.´

3. Application sets up the channel primary control structure to copy each task configuration, one at a time, to the

alternate control structure, where it is executed by the µDMA controller.

4 words (SRC A)

16 words (SRC B)

SRC

DST

ITEMS=16

Unused

SRC

DST

ITEMS=1

1 words (SRC C)

4 (DEST A)

16 (DEST B)

1 (DEST C)

DST

Task A

Task B

Task C

SRC

DST

ITEMS=12

SRC

DST

ITEMS=n

Task list in memory

21 3

Source and destination

buffer in memory

Channel control

table in memory

Channel primary

control structure

Channel alternate

control structure

Unused

ITEMS=4

Unused

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Functional Description

Figure 12-3. Memory Scatter-Gather, Setup, and Configuration

1045

SWCU117A–February 2015–Revised March 2015 Micro Direct Memory Access (µDMA)

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