LM3S3749 Luminary Micro, Inc, LM3S3749 Datasheet - Page 195

• Manufacturer Part Number: LM3S3749
• Description: Lm3s3749 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Figure 9-2. Example of Ping-Pong DMA Transaction
June 02, 2008
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 195 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
LM3S3749 Microcontroller
195