LM3S3749 Luminary Micro, Inc, LM3S3749 Datasheet - Page 198
LM3S3749
Manufacturer Part Number
LM3S3749
Description
Lm3s3749 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S3749.pdf
(753 pages)
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Micro Direct Memory Access (μDMA)
Figure 9-4. Memory Scatter-Gather, μDMA Copy Sequence
198
Using the channel’s primary control structure, the uDMA
controller copies task A configuration to the channel’s
alternate control structure.
Using the channel’s primary control structure, the uDMA
controller copies task B configuration to the channel’s
alternate control structure.
Using the channel’s primary control structure, the uDMA
controller copies task C configuration to the channel’s
alternate control structure.
in Memory
in Memory
in Memory
Task List
Task List
Task List
TASK A
TASK A
TASK B
TASK C
TASK C
TASK B
TASK C
TASK A
TASK B
COPIED
COPIED
COPIED
SRC
SRC
SRC
DST
DST
DST
uDMA Control Table
uDMA Control Table
uDMA Control Table
in Memory
in Memory
in Memory
ALT
PRI
PRI
ALT
PRI
ALT
Preliminary
SRC
DST
SRC
DST
SRC
DST
Then, using the channel’s alternate control structure, the
uDMA controller copies data from the source buffer A to
the destination buffer.
Then, using the channel’s alternate control structure, the
uDMA controller copies data from the source buffer B to
the destination buffer.
Then, using the channel’s alternate control structure, the
uDMA controller copies data from the source buffer C to
the destination buffer.
in Memory
in Memory
in Memory
DEST A
DEST B
DEST A
DEST C
DEST A
DEST B
DEST C
DEST C
Buffers
DEST B
Buffers
Buffers
SRC A
SRC B
SRC C
SRC C
SRC A
SRC B
SRC C
SRC A
SRC B
COPIED
COPIED
COPIED
June 02, 2008
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