LM3S1651 Datasheet, PDF(357/1033 Page) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

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LM3S1651 Datasheet, PDF (357/1033 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

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StellarisÂ® LM3S1651 Microcontroller

Figure 8-4. Memory Scatter-Gather, Î¼DMA Copy Sequence

Task List

in Memory

ÂµDMA Control Table

in Memory

TASK A

TASK B

TASK C

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 ÂµDMA

controller copies task A configuration to the channelâs

alternate control structure.

Then, using the channelâs alternate control structure, the

ÂµDMA controller copies data from the source buffer A to

the destination buffer.

Task List

in Memory

TASK A

TASK B

TASK C

ÂµDMA 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 ÂµDMA

controller copies task B configuration to the channelâs

alternate control structure.

Then, using the channelâs alternate control structure, the

ÂµDMA controller copies data from the source buffer B to

the destination buffer.

Task List

in Memory

ÂµDMA 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 ÂµDMA

controller copies task C configuration to the channelâs

alternate control structure.

Then, using the channelâs alternate control structure, the

ÂµDMA controller copies data from the source buffer C to

the destination buffer.

January 21, 2012

357

Texas Instruments-Production Data

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