LM3S5652 Datasheet, PDF(304/848 Page) Texas Instruments – Stellaris® LM3S5652 Microcontroller

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LM3S5652 Datasheet, PDF (304/848 Pages) Texas Instruments – Stellaris® LM3S5652 Microcontroller

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Micro Direct Memory Access (Î¼DMA)

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

Task List

in Memory

Î¼DMA Control

Table

in Memory

TASK A

TASK B

TASK C

SRC

PRI

DST

COPIED

ALT

SRC

DST

Buffers

in Memory

SRC A

SRC B

SRC C

Peripheral

Data

Register

COPIED

Using the channelâs primary control structure, the

Î¼DMA controller copies task A configuration to the

channelâs alternate control structure.

Task List

in Memory

Î¼DMA Control

Table

in Memory

Then, using the channelâs alternate control structure,

the Î¼DMA controller copies data from the source

buffer A to the peripheral data register.

Buffers

in Memory

SRC A

TASK A

TASK B

TASK C

SRC

PRI

DST

ALT

COPIED

SRC

DST

SRC B

SRC C

Peripheral

Data

Register

COPIED

Using the channelâs primary control structure, the

Î¼DMA controller copies task B configuration to the

channelâs alternate control structure.

Task List

in Memory

Î¼DMA Control

Table

in Memory

Then, using the channelâs alternate control structure,

the Î¼DMA controller copies data from the source

buffer B to the peripheral data register.

Buffers

in Memory

SRC A

TASK A

TASK B

TASK C

SRC

PRI

DST

ALT

COPIED

SRC

DST

SRC B

SRC C

Peripheral

Data

Register

COPIED

Using the channelâs primary control structure, the

Î¼DMA controller copies task C configuration to the

channelâs alternate control structure.

Then, using the channelâs alternate control structure,

the Î¼DMA controller copies data from the source

buffer C to the peripheral data register.

304

November 17, 2011

Texas Instruments-Production Data

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