STM8S903K3 datasheet(27/124 Pages) STMICROELECTRONICS

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STM8S903K3 STM8S903F3

Pinouts and pin descriptions

PA3/ TIM5_CH3

[SPI_NSS]

[UART1_TX]

I/O

X HS O3

X Port A3

Timer 5 channel

SPI master/

slave select

[AFR1] /UART1

data transmit

[AFR 1:0]

PF4

[UART1_RX]

I/O

X Port F4

UART1 data

receive [AFR1:0]

PB7

I/O

Port B7

15 10

PB6

I/O

X Port B6

16 11

PB5/ I2C_SDA

[TIM1_BKIN]

I/O

-X

(3)

Port B5

I2C data

Timer 1 - break

input [AFR4]

17 12

PB4/ I2C_SCL

[ADC_ETR]

I/O

-X

Port B4

I2C clock

ADC external

trigger [AFR4]

18 13

PB3/

AIN3/TIM1_ETR I/O

HS O3

Port B3

Analog input 3/

Timer 1 external

trigger

19 14

PB2/ AIN2/

TIM1_CH3N

I/O

X Port B2

Analog input 2/

Timer 1 -

inverted channel

20 15

PB1/ AIN1/

TIM1_CH2N

I/O

HS O3

X Port B1

Analog input 1/

Timer 1 -

inverted channel

21 16

PB0/ AIN0/

TIM1_CH1N

I/O

HS O3

X Port B0

Analog input 0/

Timer 1 -

inverted channel

22 17

PE5/ SPI_NSS

[TIM1_CH1N]

I/O

HS O3

X Port E5

SPI master/slave

select

Timer 1 -

inverted channel

1 [AFR1:0]

23 18

PC1/

TIM1_CH1/

UART1_CK

[TIM1_CH2N]

I/O

HS O3

X Port C1

Timer 1 -

channel 1

UART1 clock

Timer 1 -

inverted channel

2 [AFR1:0]

Table 6. STM8S903K3 UFQFPN32/LQFP32/SDIP32 pin descriptions (continued)

Pin name

Input

Output

STM8S903K3 Datasheet(PDF) 27 Page - STMicroelectronics

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