STM8L052R8 datasheet(24/109 Pages) STMICROELECTRONICS

24 / 109 page

Pin description

STM8L052R8

24/109

Doc ID023337 Rev 2

Table 3.

Legend/abbreviation for Table 4

Type

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

Level

Five-volt tolerant

3.6 V tolerant

Output

HS = high sink/source (20 mA)

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.

High density value line STM8L05xxx pin description

number

Pin name

Input

Output

Default alternate function

NRST/PA1(1)

I/O

X Reset

PA1

PA2/OSC_IN/

[USART1_TX](8)/

[SPI1_MISO] (8)

I/O

X Port A2

HSE oscillator input /

[USART1 transmit] / [SPI1

master in- slave out]

PA3/OSC_OUT/[USART1_

RX](8)/[SPI1_MOSI](8)

I/O

X Port A3

HSE oscillator output /

[USART1 receive]/ [SPI1

master out/slave in]/

PA4/TIM2_BKIN/

[TIM2_ETR](8)/

LCD_COM0/ADC1_IN2

I/O FT(2)

X Port A4

Timer 2 - break input

/[Timer 2 - trigger]/

LCD COM 0 / ADC1 input 2

PA5/TIM3_BKIN/

[TIM3_ETR](8)/

LCD_COM1/ADC1_IN1

I/O FT(2)

X Port A5

Timer 3 - break input

/[Timer 3 - trigger]/

LCD_COM 1 / ADC1 input

PA6/[ADC1_TRIG]/

LCD_COM2/ADC1_IN0

I/O FT(2)

X Port A6

[ADC1 - trigger] /

LCD_COM2 /

ADC1 input 0

PA7/LCD_SEG0(2)

/TIM5_CH1

I/O FT(2)

X Port A7

LCD segment 0/ TIM5

channel 1

PB0(3)/TIM2_CH1/

LCD_SEG10/ADC1_IN18

I/O FT(2)

X Port B0

Timer 2 - channel 1 / LCD

segment 10 / ADC1_IN18

PB1/TIM3_CH1/

LCD_SEG11/

ADC1_IN17

I/O FT(2)

X Port B1

Timer 3 - channel 1 / LCD

segment 11 / ADC1_IN17

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