Table 71. Dmamux Instantiation - STMicroelectronics STM32WLEx Reference Manual

RM0461
12.2 DMAMUX main features
• 14-channel programmable DMA request line multiplexer output
•
4-channel DMA request generator
• 21 trigger inputs to DMA request generator
•
21 synchronization inputs
• Per DMA request generator channel:
–
–
–
•
Per DMA request line multiplexer channel output:
–
–
–
–
–
–
•
Privileged / Unprivileged support:
–
–
12.3 DMAMUX implementation
12.3.1 DMAMUX1 instantiation
DMAMUX1 instantiated with the hardware configuration parameters listed in the following
table.
12.3.2 DMAMUX1 mapping
The mapping of resources to DMAMUX1 is hardwired.
DMAMUX1 is used with DMA1 and DMA2
•
DMAMUX1 channels 0 to 6 are connected to DMA1 channels 1 to 7
• DMAMUX1 channels 7 to 13 are connected to DMA2 channels 1 to 7
DMA request trigger input selector
DMA request counter
Event overrun flag for selected DMA request trigger input
38 input DMA request lines from peripherals
One DMA request line output
Synchronization input selector
DMA request counter
Event overrun flag for selected synchronization input
One event output, for DMA request chaining
Support for AHB privileged and unprivileged DMA transfers, independently, at a
channel level.
Privileged-aware AHB slave port.

Table 71. DMAMUX instantiation

Feature
Number of DMAMUX output request channels
Number of DMAMUX request generator channels
Number of DMAMUX request trigger inputs
Number of DMAMUX synchronization inputs
Number of DMAMUX peripheral request inputs
DMA request multiplexer (DMAMUX)
RM0461 Rev 5
DMAMUX1
14
4
21
21
38
383/1306
399