LM3S3739 Luminary Micro, Inc, LM3S3739 Datasheet - Page 192

• Manufacturer Part Number: LM3S3739
• Description: Lm3s3739 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Micro Direct Memory Access (μDMA)
Figure 9-6. Peripheral Scatter-Gather, μDMA Copy Sequence
192
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 C
TASK A
TASK B
TASK C
TASK A
TASK B
TASK C
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 peripheral data register.
Then, using the channel’s alternate control structure, the
uDMA controller copies data from the source buffer B to
the peripheral data register.
Then, using the channel’s alternate control structure, the
uDMA controller copies data from the source buffer C to
the peripheral data register.
in Memory
in Memory
in Memory
Peripheral
Peripheral
Peripheral
Register
Register
Register
Buffers
Buffers
Buffers
SRC A
SRC A
SRC C
SRC C
SRC B
SRC C
SRC B
SRC A
SRC B
Data
Data
Data
COPIED
COPIED
COPIED
June 02, 2008