Datasheet

DS12167 Rev 4 25/94
STM8L050J3 Pin description
43
Table 4. STM8L050J3 pin description
pin
n°
Pin name
Type
I/O level
Input Output
Main function
(after reset)
Default alternate function
SO8N
floating
wpu
Ext. interrupt
High sink/source
OD
PP
1
PA0
(1)
/[USART_CK]
(2)
/
SWIM/BEEP/IR_TIM
(3)
I/O - X
X
(1)
X
HS
(3)
XX
Port
A0
[USART1 synchronous clock]
(2)
/
SWIM input and output /
Beep output / Infrared Timer output
PA2/OSC_IN/[USART_TX]
(2)
/
[SPI_MISO]
(2) (4)
I/O -
X
(1)
XXHSXX
Port
A2
HSE oscillator input / [USART
transmit] / [SPI master in- slave out]
PC6/OSC32_OUT/[SPI_SCK]
(2)
/[USART_RX]/TIM2_CH2
I/O -
X
(1)
XXHSXX
Port
C6
LSE oscillator output / [SPI clock] /
[USART receive]/
Timer 2 -channel 2
2
PA3/OSC_OUT/[USART_RX]
(2)
/[SPI_MOSI]
(2)
I/O - X XXHSXX
Port
A3
HSE oscillator output / [USART
receive]/ [SPI master out/slave in]
3V
SS
/ V
REF-
/ V
SSA
--------
Ground voltage / ADC1 negative voltage
reference / Analog ground voltage
4V
DD
/ V
DDA
/ V
REF+
S-------
Digital supply voltage /Analog supply voltage
ADC1 positive voltage reference
5
PB3/TIM2_ETR/
ADC1_IN15/RTC_ALARM/COM
P1_INP
I/O - X XXHSXX
Port
B3
Timer 2 - external trigger /
ADC1_IN15 / RTC_ALARM/
Comparator1 positive input
PB5/SPI_SCK/ADC1_IN13/CO
MP1_INP
I/O - X XXHSXX
Port
B5
[SPI clock] / ADC1_IN13/
Comparator1 positive input
PD0/TIM3_CH2/[ADC1_TRIG]
(2
)
/ADC1_IN22/COMP1_INP/CO
MP2_INP
I/O - X XXHSXX
Port
D0
Timer 3 - channel 2 /
[ADC1_Trigger] / ADC1_IN22/
Comparator1 positive input/
Comparator2 positive input
6
PB6/SPI_MOSI/
ADC1_IN12/COMP1_INP
I/O - X XXHSXX
Port
B6
SPI master out/
slave in / ADC1_IN12/ Comparator1
positive input
7
PB7/SPI_MISO/ADC1_IN11/CO
MP1_INP
I/O - X XXHSXX
Port
B7
SPI1 master in- slave out/
ADC1_IN11/ Comparator1 positive
input
PC0/I2C_SDA I/O - X -X-T
(5)
-
Port
C0
I2C data
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