Datasheet

STM8S903K3 UFQFPN32/LQFP32/SDIP32 pinout5.4
Figure 5: STM8S903K3 UFQFPN32/LQFP32 pinout
[ADC_ETR] I
2
C_SCL/(T) PB4
TIM1_ETR/AIN3/(HS) PB3
TIM1_CH3N/AIN2/(HS) PB2
TIM1_CH2N/AIN1/(HS) PB1 TIM1_CH1N/AIN0/(HS) PB0
PB7
PB6
[TIM1_BKIN] I
2
C_SDA/(T) PB5
32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
9 10 11 12 13 14 15
16
1
2
3
4
5
6
7
8
VCAP
V
DD
[UART1_TX] [SPI_NSS] TIM5_CH3/(HS) PA3
[UART1_RX] PF4
NRST
OSCIN/PA1
OSCOUT/PA2
V
SS
PC3 (HS)/TIM1_CH3 [TLI] [TIM1_CH1N]
PC2 (HS)/TIM1_CH2 [TIM1_CH3N]
PC1 (HS)/TIM1_CH1/UART1_CK [TIM1_CH2N]
PE5/SPI_NSS [TIM1_CH1N]
PC7 (HS)/SPI_MISO [TIM1_CH2]
PC6 (HS)/SPI_MOSI [TIM1_CH1]
PC5 (HS)/SPI_SCK [TIM5_CH1]
PC4 (HS)/TIM1_CH4/CLK_CCO [AIN2] [TIM1_CH2N]
PD3 (HS)/AIN4/TIM5_CH2/ADC_ETR
PD2 (HS)[AIN3] [TIM5_CH3]
PD1 (HS)/SWIM PD0 (HS)/ TIM1_BKIN [CLK_CCO]
PD7 (HS)/TLI [TIM1_CH4]
PD6 (HS)/AIN6/UART1_RX PD5 (HS)/AIN5/UART1_TX PD4 (HS)/BEEP/TIM5_CH1 [UART1_CK]
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).
23/116DocID15590 Rev 8
Pinout and pin descriptionSTM8S903K3 STM8S903F3