STM8L151F3P6 datasheet(27/112 Pages) STMICROELECTRONICS

27 / 112 page

STM8L151x2, STM8L151x3

Pin description

Doc ID 018780 Rev 4

27/112

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 STM8L15xxx pin description

Pin number

Pin name

Input

Output

Default alternate

function

114 NRST/PA1(1)

I/O

X Reset

PA1

225

PA2/OSC_IN/

[USART_TX](2)/

[SPI_MISO] (2)

I/O

X Port A2

HSE oscillator input /

[USART transmit] / [SPI

master in- slave out] /

336

PA3/OSC_OUT/[USA

RT_RX](2)/[SPI_MOSI

](2)

I/O

X Port A3

HSE oscillator output /

[USART receive]/ [SPI

master out/slave in]/

PA4/TIM2_BKIN/

[TIM2_ETR](2)

ADC1_IN2

I/O

X Port A4

Timer 2 - break input /

[Timer 2 - external

trigger] /ADC1 input 2

PA5/TIM3_BKIN/

[TIM3_ETR](2)/ADC1_

IN1

I/O

X Port A5

Timer 3 - break input /

[Timer 3 - external

trigger] /

ADC1input 1

PA6/ADC1_TRIG/

ADC1_IN0

I/O

X Port A6

ADC1- trigger

/ADC1input 0

- PA7

I/O

X Port A7

24 13 12

PB0(3)/TIM2_CH1/

ADC1_IN18

I/O

X Port B0

Timer 2 - channel 1 /

ADC1_IN18

25 14 13

PB1/TIM3_CH1/

ADC1_IN17

I/O

X Port B1

Timer 3 - channel 1 /

ADC1_IN17

26 15 14

PB2/ TIM2_CH2/

ADC1_IN16

I/O

X Port B2

Timer 2 - channel 2

ADC1_IN16

27 16 15 10 13

PB3/TIM2_ETR/

ADC1_IN15/RTC_AL

ARM(4)

I/O

X Port B3

Timer 2 - external

trigger / ADC1_IN15 /

RTC_ALARM (4)

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