LM3S5956-IQR80-C1 Datasheet, PDF(366/1144 Page) Texas Instruments – Stellaris® LM3S5956 Microcontroller

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LM3S5956-IQR80-C1 Datasheet, PDF (366/1144 Pages) Texas Instruments – Stellaris® LM3S5956 Microcontroller

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NRND: Not recommended for new designs.

Micro Direct Memory Access (Î¼DMA)

Figure 8-6. Peripheral Scatter-Gather, Î¼DMA Copy Sequence

Task List

in Memory

ÂµDMA Control Table

in Memory

Buffers

in Memory

SRC A

TASK A

TASK B

TASK C

SRC

DST

PRI

COPIED

SRC

ALT

DST

SRC B

SRC C

Peripheral

Data

Register

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 peripheral data register.

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

Peripheral

Data

Register

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 peripheral data register.

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

Peripheral

Data

Register

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 peripheral data register.

366

October 06, 2012

Texas Instruments-Production Data

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