LM3S3748 Datasheet, PDF(198/753 Page) List of Unclassifed Manufacturers – Microcontroller

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LM3S3748 Datasheet, PDF (198/753 Pages) List of Unclassifed Manufacturers – Microcontroller

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Micro Direct Memory Access (Î¼DMA)

Figure 9-4. Memory Scatter-Gather, Î¼DMA Copy Sequence

Task List

in Memory

TASK A

TASK B

TASK C

uDMA Control Table

in Memory

SRC

DST

PRI

COPIED

SRC

ALT

DST

Buffers

in Memory

SRC A

SRC B

SRC C

DEST A

DEST B

DEST C

COPIED

Using the channelâs primary control structure, the uDMA

controller copies task A configuration to the channelâs

alternate control structure.

Then, using the channelâs alternate control structure, the

uDMA controller copies data from the source buffer A to

the destination buffer.

Task List

in Memory

uDMA Control Table

in Memory

Buffers

in Memory

TASK A

TASK B

TASK C

SRC

DST

PRI

COPIED

SRC

ALT

DST

SRC A

SRC B

SRC C

DEST A

DEST B

DEST C

COPIED

Using the channelâs primary control structure, the uDMA

controller copies task B configuration to the channelâs

alternate control structure.

Then, using the channelâs alternate control structure, the

uDMA controller copies data from the source buffer B to

the destination buffer.

Task List

in Memory

uDMA Control Table

in Memory

Buffers

in Memory

TASK A

TASK B

TASK C

SRC

DST

PRI

COPIED

ALT

Using the channelâs primary control structure, the uDMA

controller copies task C configuration to the channelâs

alternate control structure.

SRC A

SRC B

SRC

SRC C

DST

DEST A

COPIED

DEST B

DEST C

Then, using the channelâs alternate control structure, the

uDMA controller copies data from the source buffer C to

the destination buffer.

198

April 08, 2008

Preliminary

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