Dmamux Main Features; Dmamux Implementation; Dmamux Instantiation; Dmamux Mapping - ST STM32G0 1 Series Reference Manual

RM0444
11.2

DMAMUX main features

• up to 12-channel programmable DMA request line multiplexer output
•
4-channel DMA request generator
• 23 trigger inputs to DMA request generator
•
23 synchronization inputs
• Per DMA request generator channel:
–
–
–
•
Per DMA request line multiplexer channel output:
–
–
–
–
–
–
11.3

DMAMUX implementation

11.3.1

DMAMUX instantiation

DMAMUX is instantiated with the hardware configuration parameters listed in the following
table.
1. 12 for STM32G0B1xx and STM32G0C1xx, seven for STM32G071xx and STM32G081xx as well as for
STM32G051xx and STM32G061xx, and five for STM32G031xx and STM32G041xx devices.
11.3.2

DMAMUX mapping

The mapping of resources to DMAMUX is hardwired.
DMA request trigger input selector
DMA request counter
Event overrun flag for selected DMA request trigger input
up to 73 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

Table 51. 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)
RM0444 Rev 5
DMAMUX
(1)
12/7/5
4
23
23
up to 73
299/1390
313