STM8AP5X2ATAY datasheet(29/100 Pages) STMICROELECTRONICS

29 / 100 page

STM8AF61xx, STM8AF51xx

Pinouts and pin description

29/100

Table 6.

STM8A microcontroller family pin description

Pin number

Pin name

Input

Output

Main

function

(after

reset)

Default alternate

function

Alternate

function

after

remap

[option bit]

1111 NRST

I/O

Reset

2222 PA1/OSCIN

I/O

XO1

X Port A1

Resonator/crystal

3333 PA2/OSCOUT

I/O

X Port A2

Resonator/crystal

out

444

VSSIO_1

I/O ground

5554 VSS

Digital ground

6665 VCAP

1.8 V regulator capacitor

7776 VDD

Digital power supply

8887 VDDIO_1

I/O power supply

PA3/TIM2_CC3

I/O

X Port A3

Timer 2 -

channel3

TIM3_CC1

[AFR1]

10 10 10

PA4/USART_RX

I/O

X Port A4

USART receive

11 11 11

PA5/USART_TX

I/O

X Port A5

USART transmit

12 12 12

PA6/USART_CK

I/O

X Port A6

USART

synchronous

clock

---

PH0

I/O

XHS O3

X Port H0

---

PH1

I/O

XHS O3

X Port H1

---

PH2

I/O

XO1

X Port H2

---

PH3

I/O

XO1

X Port H3

17 13

PF7/AIN15

I/O

XO1

X Port F7

Analog input 15

18 14

PF6/AIN14

I/O

XO1

X Port F6

Analog input 14

19 15

PF5/AIN13

I/O

XO1

X Port F5

Analog input 13

20 16

8 PF4/AIN12

I/O

XO1

X Port F4

Analog input 12

21 17

PF3/AIN11

I/O

XO1

X Port F3

Analog input 11

22 18

VREF+

ADC positive reference

voltage

23 19 13

9 VDDA

Analog power supply

24 20 14 10 VSSA

Analog ground

25 21

VREF-

ADC negative reference

voltage

26 22

PF0/AIN10

I/O

XO1

X Port F0

Analog input 10

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