Datasheet

Table 16: STM8S903F3 alternate function remapping bits [1:0] for 20-pin packages
Alternate function mappingI/O portAFR0 option bit
value
AFR1 option bit
value
AFR1 and AFR0 remapping options inactive:
Default alternate functions
(1)
00
TIM5_CH1
PC510
TIM1_CH1PC6
TIM1_CH2PC7
SPI_NSS
PA301
TIM5_CH3PD2
TIM5_CH3PD2
11
TIM5_CH1PC5
TIM1_CH1PC6
TIM1_CH2PC7
—PC2
—PC1
TIM1_CH1NPE5
UART1_TXPA3
UART1_RXPF4
(1)
Refer to pinout description.
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STM8S903K3 STM8S903F3Option bytes