LM3S5632 Luminary Micro, Inc, LM3S5632 Datasheet - Page 188

• Manufacturer Part Number: LM3S5632
• Description: Lm3s5632 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Micro Direct Memory Access (μDMA)
Figure 9-5. Peripheral Scatter-Gather, Setup and Configuration
188
C
B
A
NOTES:
1. Application has a need to copy data items from three separate location in memory into a peripheral data
2. Application sets up uDMA “task list” in memory, which contains the pointers and control configuration for three
3. Application sets up the channel primary control structure to copy each task configuration, one at a time, to the
Peripheral Data
register.
uDMA copy “tasks.”
alternate control structure, where it will be executed by the uDMA controller.
16 WORDS (SRC B)
Source Buffer
4 WORDS (SRC A)
1 WORD (SRC C)
in Memory
Register
DEST
1
Task List in Memory
ITEMS=16
ITEMS=4
ITEMS=1
SRC
SRC
SRC
DST
DST
DST
2
Preliminary
“TASK” A
“TASK” B
“TASK” C
Table in Memory
Channel Control
ITEMS=12
ITEMS=n
SRC
DST
SRC
DST
3
Channel Primary
Control Structure
Channel Alternate
Control Structure
June 02, 2008