STM8L101 datasheet(20/81 Pages) STMICROELECTRONICS

20 / 81 page

Pin description

STM8L101xx

20/81

Doc ID 15275 Rev 11

Table 3.

Legend/abbreviation for table 4

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 4.

STM8L101xx pin description

Pin number

Pin name

Input

Output

Alternate function

411

1NRST/PA1(2)

I/O

Reset

PA1

522

2PA2

I/O X

Port A2

633

3PA3

I/O X

Port A3

PA4/TIM2_BKIN

I/O X

Port A4

Timer 2 - break input

PA5/TIM3_BKIN

I/O X

Port A5

Timer 3 - break input

PA6/COMP_REF

I/O X

Port A6

Comparator external

reference

766

7VSS

Ground

877

8VDD

Power supply

988

PD0/TIM3_CH2/

COMP1_CH3

I/O X

Port D0

Timer 3 - channel 2 /

Comparator 1 -

channel 3

PD1/TIM3_TRIG/

COMP1_CH4

I/O X

Port D1

Timer 3 - trigger /

Comparator 1 -

channel 4

10 10 11

PD2/

COMP2_CH3

I/O X

Port D2

Comparator 2 -

channel 3

11 11 12

PD3/

COMP2_CH4

I/O X

Port D3

Comparator 2 -

channel 4

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