Figure 27. Selecting An Alternate Function On Stm32F42Xxx And Stm32F43Xxx - ST STM32F405 Reference Manual

RM0090

Figure 27. Selecting an alternate function on STM32F42xxx and STM32F43xxx

AF0 (system)
AF1 (TIM1/TIM2)
AF2 (TIM3..5)
AF3 (TIM8..11)
AF4 (I2C1..3)
AF5 (SPI1/2/3/4/5/6)
AF6 (SPI2/3/SAI1)
AF7 (USART1..3)
AF8 (USART4..8)
AF9 (CAN1/CAN2, LTDC, TIM12..14)
AF10 (OTG_FS, OTG_HS)
AF11 (ETH)
AF12 (FMC, SDIO, OTG_HS
AF13 (DCMI)
AF14 (LTDC)
AF15 (EVENTOUT)
AF0 (system)
AF1 (TIM1/TIM2)
AF2 (TIM3..5)
AF3 (TIM8..11)
AF4 (I2C1..3)
AF5 (SPI1/2/4/5/6)
AF6 (SPI2/3/SAI1)
AF7 (USART1..3)
AF8 (USART4..8)
AF9 (CAN1/CAN2, TIM12..14)
AF10 (OTG_FS, OTG_HS)
AF11 (ETH)
AF12 (FMC, SDIO, OTG_HS
AF13 (DCMI)
AF14 (LTDC)
AF15 (EVENTOUT)
1. Configured in FS.
For pins 0 to 7, the GPIOx_AFRL[31:0] register selects the dedicated alternate function
(1)
)
For pins 8 to 15, the GPIOx_AFRH[31:0] register selects the dedicated alternate function
(1)
)
AFRL[31:0]
AFRH[31:0]
RM0090 Rev 18
General-purpose I/Os (GPIO)
Pin x (x = 0..7)
1
Pin x (x = 8..15)
1
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