DMA request multiplexer (DMAMUX) RM0453
482/1450 RM0453 Rev 5
14.3.2 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
Number of DMAMUX synchronization inputs 21
Number of DMAMUX peripheral request inputs 38
DMAMUX security support Yes
Table 82. DMAMUX instantiation (continued)
Feature DMAMUX1
Table 83. DMAMUX1: assignment of multiplexer inputs to resources
DMA
request
MUX input
Resource
DMA
request
MUX input
Resource
DMA
request
MUX input
Resource
1 dmamux_req_gen0 22 LPUART1_TX 43 Reserved
2 dmamux_req_gen1 23 TIM1_CH1 44 Reserved
3 dmamux_req_gen2 24 TIM1_CH2 45 Reserved
4 dmamux_req_gen3 25 TIM1_CH3 46 Reserved
5 ADC 26 TIM1_CH4 47 Reserved
6 DAC_OUT1 27 TIM1_UP 48 Reserved
7 SPI1_RX 28 TIM1_TRIG 49 Reserved
8 SPI1_TX 29 TIM1_COM 50 Reserved
9 SPI2_RX 30 TIM2_CH1 51 Reserved
10 SPI2_TX 31 TIM2_CH2 52 Reserved
11 I2C1_RX 32 TIM2_CH3 53 Reserved
12 I2C1_TX 33 TIM2_CH4 54 Reserved
13 I2C2_RX 34 TIM2_UP 55 Reserved
14 I2C2_TX 35 TIM16_CH1 56 Reserved
15 I2C3_RX 36 TIM16_UP 57 Reserved
16 I2C3_TX 37 TIM17_CH1 58 Reserved
17 USART1_RX 38 TIM17_UP 59 Reserved
18 USART1_TX 39 AES_IN 60 Reserved
19 USART2_RX 40 AES_OUT 61 Reserved
20 USART2_TX 41 SUBGHZSPI_RX 62 Reserved
21 LPUART1_RX 42 SUBGHZSPI_TX 63 Reserved
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