LM3S3739 Luminary Micro, Inc, LM3S3739 Datasheet - Page 186
LM3S3739
Manufacturer Part Number
LM3S3739
Description
Lm3s3739 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S3739.pdf
(664 pages)
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Micro Direct Memory Access (μDMA)
Figure 9-2. Example of Ping-Pong DMA Transaction
186
Alternate Structure
Alternate Structure
Primary Structure
Primary Structure
alternate control structures to switch back and forth between buffers as the data flows to or from
the peripheral.
Refer to Figure 9-2 on page 186 for an example showing operation in Ping-Pong mode.
uDMA Controller
SOURCE
SOURCE
SOURCE
SOURCE
DEST
DEST
DEST
DEST
transfers using BUFFER B
transfers using BUFFER B
transfers using BUFFER A
transfers using BUFFER A
Preliminary
BUFFER A
BUFFER B
BUFFER A
BUFFER B
Cortex-M3 Processor
Process data in BUFFER A
Reload primary structure
Process data in BUFFER B
Reload alternate structure
Process data in BUFFER B
Reload alternate structure
June 02, 2008
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