Datasheet
STM32F091xB STM32F091xC
42/128 DocID026284 Rev 4
Table 15. Alternate functions selected through GPIOB_AFR registers for port B
Pin name AF0 AF1 AF2 AF3 AF4 AF5
PB0 EVENTOUT TIM3_CH3 TIM1_CH2N TSC_G3_IO2 USART3_CK -
PB1 TIM14_CH1 TIM3_CH4 TIM1_CH3N TSC_G3_IO3 USART3_RTS -
PB2 - - - TSC_G3_IO4 - -
PB3 SPI1_SCK, I2S1_CK EVENTOUT TIM2_CH2 TSC_G5_IO1 USART5_TX -
PB4 SPI1_MISO, I2S1_MCK TIM3_CH1 EVENTOUT TSC_G5_IO2 USART5_RX TIM17_BKIN
PB5 SPI1_MOSI, I2S1_SD TIM3_CH2 TIM16_BKIN I2C1_SMBA USART5_CK_RTS -
PB6 USART1_TX I2C1_SCL TIM16_CH1N TSC_G5_IO3 - -
PB7 USART1_RX I2C1_SDA TIM17_CH1N TSC_G5_IO4 USART4_CTS -
PB8 CEC I2C1_SCL TIM16_CH1 TSC_SYNC CAN_RX -
PB9 IR_OUT I2C1_SDA TIM17_CH1 EVENTOUT CAN_TX SPI2_NSS, I2S2_WS
PB10 CEC I2C2_SCL TIM2_CH3 TSC_SYNC USART3_TX SPI2_SCK, I2S2_CK
PB11 EVENTOUT I2C2_SDA TIM2_CH4 TSC_G6_IO1 USART3_RX -
PB12 SPI2_NSS, I2S2_WS EVENTOUT TIM1_BKIN TSC_G6_IO2 USART3_CK TIM15_BKIN
PB13 SPI2_SCK, I2S2_CK - TIM1_CH1N TSC_G6_IO3 USART3_CTS I2C2_SCL
PB14 SPI2_MISO, I2S2_MCK TIM15_CH1 TIM1_CH2N TSC_G6_IO4 USART3_RTS I2C2_SDA
PB15 SPI2_MOSI, I2S2_SD TIM15_CH2 TIM1_CH3N TIM15_CH1N - -
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