STM8L052R8T6 Datasheet, PDF (22/55 Pages) STMicroelectronics – Value Line, 8-bit ultralow power MCU, 64-KB Flash

Pin description
STM8L052R8
Table 3.
Type
Legend/abbreviation for Table 4
I= input, O = output, S = power supply
FT
Five-volt tolerant
Level
TT
3.6 V tolerant
Output HS = high sink/source (20 mA)
Port and control ^Input
configuration _Output
float = floating, wpu = weak pull-up
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.
Pin
number
High density value line STM8L05xxx pin description
Input
Output
Pin name
Default alternate function
2 NRST/PA1⁽¹⁾
I/O
X
HS X X Reset PA1
PA2/OSC_IN/
3 [USART1_TX]⁽⁸⁾/
[SPI1_MISO] ⁽⁸⁾
HSE oscillator input /
I/O
X X X HS X X Port A2 [USART1 transmit] / [SPI1
master in- slave out]
4
PA3/OSC_OUT/[USART1_
RX]⁽⁸⁾/[SPI1_MOSI]⁽⁸⁾
I/O
HSE oscillator output /
X X X HS X X Port A3 [USART1 receive]/ [SPI1
master out/slave in]/
PA4/TIM2_BKIN/
5 [TIM2_ETR]⁽⁸⁾/
LCD_COM0/ADC1_IN2
Timer 2 - break input
I/O FT⁽²⁾ X X X HS X X Port A4 /[Timer 2 - trigger]/
LCD COM 0 / ADC1 input 2
PA5/TIM3_BKIN/
6 [TIM3_ETR]⁽⁸⁾/
LCD_COM1/ADC1_IN1
Timer 3 - break input
I/O FT⁽²⁾ X
X
X
HS X
X
Port A5
/[Timer 3 - trigger]/
LCD_COM 1 / ADC1 input
1
7
PA6/[ADC1_TRIG]/
LCD_COM2/ADC1_IN0
[ADC1 - trigger] /
I/O FT⁽²⁾ X X X HS X X Port A6 LCD_COM2 /
ADC1 input 0
8
PA7/LCD_SEG0⁽²⁾
/TIM5_CH1
I/O FT⁽²⁾ X
X
X
HS X
X
Port A7
LCD segment 0/ TIM5
channel 1
31
PB0⁽³⁾/TIM2_CH1/
LCD_SEG10/ADC1_IN18
I/O FT⁽²⁾ X
X
X
HS X
X
Port B0
Timer 2 - channel 1 / LCD
segment 10 / ADC1_IN18
PB1/TIM3_CH1/
32 LCD_SEG11/
ADC1_IN17
I/O FT⁽²⁾ X
X
X
HS X
X
Port B1
Timer 3 - channel 1 / LCD
segment 11 / ADC1_IN17
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Doc ID 023133 Rev 2