Datasheet

Pin description STM8L052C6
22/52 Doc ID 022924 Rev 2
Table 3. Legend/abbreviation for Table 4
Type I= input, O = output, S = power supply
Level
FT Five-volt tolerant
TT 3.6 V tolerant
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. Medium density value line STM8L05xxx pin description
Pin
number
Pin name
Type
I/O level
Input Output
Main function
(after reset)
Default alternate function
LQFP48
floating
wpu
Ext. interrupt
High sink/source
OD
PP
2 NRST/PA1
(1)
I/O X HS X Reset PA 1
3
PA2/OSC_IN/
[USART1_TX]
(8)
/
[SPI1_MISO]
(8)
I/O X X X HS X X Port A2
HSE oscillator input /
[USART1 transmit] / [SPI1
master in- slave out]
4
PA3/OSC_OUT/[USART1_
RX]
(8)
/[SPI1_MOSI]
(8)
I/O X X X HS X X Port A3
HSE oscillator output /
[USART1 receive]/ [SPI1
master out/slave in]/
5
PA4/TIM2_BKIN/
LCD_COM0/ADC1_IN2
I/O TT
(2)
XXXHSXXPort A4
Timer 2 - break input /
LCD COM 0 / ADC1 input 2
6
PA5/TIM3_BKIN/
LCD_COM1/ADC1_IN1
I/O TT
(2)
XXXHSXXPort A5
Timer 3 - break input /
LCD_COM 1 / ADC1 input
1
7
PA 6/ [ADC1_TRIG]/
LCD_COM2/ADC1_IN0
I/O TT
(2)
XXXHSXXPort A6
[ADC1 - trigger] /
LCD_COM2 /
ADC1 input 0
8 PA7/LCD_SEG0
(3)
I/O FT X X X HS X X Port A7 LCD segment 0
24
PB0
(4)
/TIM2_CH1/
LCD_SEG10/ADC1_IN18
I/O TT
(2)
X
(4)
X
(4)
XHSX XPort B0
Timer 2 - channel 1 / LCD
segment 10 / ADC1_IN18
25
PB1/TIM3_CH1/
LCD_SEG11/
ADC1_IN17
I/O TT
(2)
XXXHSXXPort B1
Timer 3 - channel 1 / LCD
segment 11 / ADC1_IN17
26
PB2/ TIM2_CH2/
LCD_SEG12/
ADC1_IN16
I/O TT
(2)
XXXHSXXPort B2
Timer 2 - channel 2 / LCD
segment 12 / ADC1_IN16