STM8L151C2 datasheet(27/122 Pages) STMICROELECTRONICS

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STM8L151x2, STM8L151x3

Pinout and pin description

Table 3. Legend/abbreviation for table 4

Type

I= input, O = output, S = power supply

Level

Output

HS = high sink/source (20 mA)

Five-volt tolerant

Port and control

configuration

Input

float = floating, wpu = weak pull-up

Output

T = true open drain, OD = open drain, PP = push pull

Reset state

Bold X (pin state after reset release).

Unless otherwise specified, the pin state is the same during the reset phase (i.e.

“under reset”) and after internal reset release (i.e. at reset state).

Table 4. Low-density STM8L151x2/3 pin description

Pin number

Pin name

Input

Output

Default alternate

function

111

4 NRST/PA1(1)

I/O

X Reset

PA1

222

PA2/OSC_IN/

[USART_TX](2)/

[SPI_MISO] (2)

I/O

HS X

X Port A2

HSE oscillator input /

[USART transmit] / [SPI

master in- slave out] /

333

PA3/OSC_OUT/[USA

RT_RX](2)/[SPI_MOSI

](2)

I/O

HS X

X Port A3

HSE oscillator output /

[USART receive]/ [SPI

master out/slave in]/

PA4/TIM2_BKIN/

[TIM2_ETR](2)

ADC1_IN2/

COMP1_INP

I/O

HS X

X Port A4

Timer 2 - break input /

[Timer 2 - external

trigger] /ADC1 input 2/

Comparator1 positive

input

PA5/TIM3_BKIN/

[TIM3_ETR](2)/

ADC1_IN1/

COMP1_INP

I/O

HS X

X Port A5

Timer 3 - break input /

[Timer 3 - external

trigger] /ADC1input 1/

Comparator1 positive

input

PA6/ADC1_TRIG/

ADC1_IN0/

COMP1_INP

I/O

HS X

X Port A6

ADC1- trigger

/ADC1input 0/

Comparator1 positive

input

- PA7

I/O

HS X

X Port A7

24 13 12 7 10

PB0(3)/TIM2_CH1/

ADC1_IN18/

COMP1_INP

I/O

HS X

X Port B0

Timer 2 - channel 1 /

ADC1_IN18/

Comparator1 positive

input

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