Datasheet

DocID15962 Rev 13 27/131
STM8L151xx, STM8L152xx Pin description
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Table 4. Legend/abbreviation for table 5
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 5. Medium density STM8L15x pin description
Pin number
Pin name
Type
I/O level
Input Output
Main function
(after reset)
Default alternate
function
LQFP48 and UFQFPN48 LQFP32 and UFQFPN32
UFQFPN28
WLCSP28
floating
wpu
Ext. interrupt
High sink/source
OD
PP
2 1 1 C3 NRST/PA1
(1)
I/O X HS X Reset PA1
322B4
PA2/OSC_IN/
[USART1_TX]
(4)
/
[SPI1_MISO]
(4)
I/O X XXHSXXPort A2
HSE oscillator input /
[USART1 transmit] /
[SPI1 master in- slave
out] /
433C4
PA3/OSC_OUT/
[USART1_RX]
(4)
/
[SPI1_MOSI]
(4)
I/O X XXHSXXPort A3
HSE oscillator output /
[USART1 receive]/ [SPI1
master out/slave in]/
5- --
PA4/TIM2_BKIN/
LCD_COM0
(2)
/ADC1_IN2/
COMP1_INP
I/O
TT
(3)
X XXHSXXPort A4
Timer 2 - break input /
LCD COM 0 / ADC1
input 2 / Comparator 1
positive input
-44D3
PA4/TIM2_BKIN/
[TIM2_ETR]
(4)
/
LCD_COM0
(2)
/
ADC1_IN2/COMP1_INP
I/O
TT
(3)
X XXHSXXPort A4
Timer 2 - break input /
[Timer 2 - external
trigger] / LCD_COM 0 /
ADC1 input 2 /
Comparator 1 positive
input