STM8L15 datasheet(27/122 Pages) STMICROELECTRONICS

27 / 122 page

STM8L151xx, STM8L152xx

Pin description

Doc ID 15962 Rev 5

27/122

Table 4.

Legend/abbreviation for table 5

Type

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

Level

Input

CM = CMOS

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 5.

STM8L15x pin description

number

Pin name

Input

Output

Default alternate

function

1 C3 NRST/PA1(1)

I/O

X Reset

PA1

2 B4

PA2/OSC_IN/

[USART1_TX](3)/

[SPI1_MISO] (3)

I/O

X Port A2

HSE oscillator input /

[USART1 transmit] /

[SPI1 master in- slave

out] /

3 C4

PA3/OSC_OUT/[USART1

_RX](3)/[SPI1_MOSI](3)

I/O

X Port A3

HSE oscillator output /

[USART1 receive]/ [SPI1

master out/slave in]/

PA4/TIM2_BKIN/

LCD_COM0(2)/ADC1_IN2/

COMP1_INP

I/O

X Port A4

Timer 2 - break input /

LCD COM 0 / ADC1

input 2 / Comparator 1

positive input

-4

4 D3

PA4/TIM2_BKIN/

[TIM2_TRIG](3)/

LCD_COM0(2)/

ADC1_IN2/COMP1_INP

I/O

X Port A4

Timer 2 - break input /

[Timer 2 - trigger] /

LCD_COM 0 / ADC1

input 2 /

Comparator 1 positive

input

PA5/TIM3_BKIN/

LCD_COM1(2)/ADC1_IN1/

COMP1_INP

I/O

X Port A5

Timer 3 - break input /

LCD_COM 1 / ADC1

input 1/

Comparator 1 positive

input

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