Pin description

STM8L051F3

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Doc ID 022985 Rev 1

Note:

The slope control of all GPIO pins, except true open drain pins, can be programmed. By

default, the slope control is limited to 2 MHz.

17 PB7/SPI1_MISO/ADC1_IN11

I/O X

XX HS X

X Port B7

SPI1 master in- slave out/

ADC1_IN11

18 PC0/I2C_SDA

I/O X

Port C0 I2C data

19 PC1/I2C_SCL

I/O X

XT(3)

Port C1 I2C clock

20

PC4/USART_CK]/

I2C_SMB/CCO/ADC1_IN4

I/O X

XX HS X

X Port C4

USART synchronous clock /

I2C1_SMB / Configurable clock

output / ADC1_IN4

1

PC5/OSC32_IN /[SPI1_NSS](2)/

[USART_TX](2)/TIM2_CH1

I/O X

XX HS X

X Port C5

LSE oscillator input / [SPI

master/slave select] / [USART

transmit]/Timer 2 -channel 1

2

PC6/OSC32_OUT/[SPI_SCK](2)/[

USART_RX](2)/TIM2_CH2

I/O X

XX HS X

X Port C6

LSE oscillator output / [SPI clock] /

[USART receive]/

Timer 2 -channel 2

9

PD0/TIM3_CH2/[ADC1_TRIG](2)/

ADC1_IN22

I/O X

XX HS X

X Port D0

Timer 3 - channel 2 / [ADC1_Trigger]

/ ADC1_IN22

S

Digital supply voltage /

ADC1 positive voltage reference

Ground voltage / ADC1 negative voltage

reference / Analog ground voltage

3

I/O X

X

X

HS

(6)

XX Port A0

[USART1 synchronous clock](2) /

SWIM input and output /

Beep output / Infrared Timer output

1.

At power-up, the PA1/NRST pin is a reset input pin with pull-up. To be used as a general purpose pin (PA1), it can be

configured only as output open-drain or push-pull, not as a general purpose input. Refer to Section Configuring NRST/PA1

pin as general purpose output in the STM8L15xxx and STM8L16xxx reference manual (RM0031).

2.

[ ] Alternate function remapping option (if the same alternate function is shown twice, it indicates an exclusive choice not a

duplication of the function).

3.

A pull-up is applied to PB0 and PB4 during the reset phase. These two pins are input floating after reset release.

4.

implemented).

5.

The PA0 pin is in input pull-up during the reset phase and after reset release.

6.

High Sink LED driver capability available on PA0.

Table 4.

Low density value line STM8L05xxx pin description (continued)

pin

n°

Pin name

Input

Output

Default alternate function