STM8AL3148 datasheet(28/124 Pages) STMICROELECTRONICS

28 / 124 page

Pin description

STM8AL313x/4x/6x STM8AL3L4x/6x

28/124

DocID18474 Rev 7

Table 4. Legend/abbreviation

Type

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

I/O level

3.6 V tolerant

Five-volt tolerant

Port and control

configuration

Input

– floating

– wpu = weak pull-up

– Ext. interrupt = external interrupt

Output

– HS = high sink/source

– OD = open drain (where T defines a true open drain)

– PP = push pull

Reset state

Underlined 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. Medium-density STM8AL313x/4x/6x and STM8AL3L4x/6x pin description

Pin number

Pin name

Input

Output

Default alternate

function

1 NRST/PA1(1)

I/O

X Reset

PA1

PA2/OSC_IN/

[USART1_TX](4)/

[SPI1_MISO] (4)

I/O

X Port A2

HSE oscillator input /

[USART1 transmit] /

[SPI1 master in- slave

out]

PA3/OSC_OUT/[USART1

_RX](4)/[SPI1_MOSI](4)

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 TT(3) X

X Port A4

Timer 2 - break input /

LCD COM 0 / ADC1

input 2 / Comparator

1 positive input

-4

PA4/TIM2_BKIN/

[TIM2_ETR](4)/

LCD_COM0(2)/

ADC1_IN2/COMP1_INP

I/O TT(3) X

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 TT(3) X

X Port A5

Timer 3 - break input /

LCD_COM 1 / ADC1

input 1/

Comparator 1 positive

input

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