Datasheet

STM8S903F3 UFQFPN20 pinout5.2
Figure 4: STM8S903F3 UFQFPN20 pinout
2
1
3
4
5
6 7 8
9
11
12
13
14
15
16171819
VCAP
V
SS
OSCOUT/PA2
OSCIN/PA1
[UART1_TX]/[SPI_NSS]/TIM5_CH3/(HS) PA3
NRST
PD4 (HS)/BEEP / TIM5_CH1/UART1_CK
PD5(HS)/AIN5/UART1_TX
PD3 (HS)/AIN4/TIM5_CH2/ADC_ETR
PD2(HS)/AIN3/[TIM5_CH3]
PC4(HS)/TIM1_CH4/CLK_CCO/AIN2/[TIM1_CH2N]
PC5 (HS)/SPI_SCK/[TIM5_CH1]
PC6(HS)/SPI_MOSI/[TIM1_CH1]
PC7(HS)/SPI_MISO/[TIM1_CH2]
PD1(HS)/SWIM
[TIM1_BKIN]/I
2
C_SDA/(T)PB5
10
[TIM1_CH1N]/[TLI]/TIM1_CH3/(HS)PC3
PD6(HS)/AIN6/UART1_RX
20
V
DD
[ADC_ETR]/I
2
C_SCL/(T)PB4
1. (HS) high sink capability.
2. (T) true open drain (P-buffer and protection diode to V
DD
not implemented).
3. [ ] alternate function remapping option (if the same alternate function is shown twice, it
indicates an exclusive choice not a duplication of the function).
21/116DocID15590 Rev 8
Pinout and pin descriptionSTM8S903K3 STM8S903F3