STM8L101XX Datasheet, PDF (20/77 Pages) STMicroelectronics – 8-bit ultralow power microcontroller with up to 8 Kbytes Flash, multifunction timers, comparators, USART, SPI, I2C

Pin description
STM8L101xx
Table 3. Legend/abbreviation for table 4
Type
I= input, O = output, S = power supply
Level
Input
Output
CM = CMOS
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 is shown in bold.
Table 4. STM8L101xx pin description
Pin number
Input
Output
Pin name
Alternate function
1 1 4 1 1 1 NRST/PA1⁽²⁾
I/O
HS X X Reset PA1
2 2 5 2 2 2 PA2
I/O X X X HS X X Port A2
3 - 6 3 3 3 PA3
I/O X X X HS X X Port A3
- - - 4 4 4 PA4/TIM2_BKIN I/O X X X HS X X Port A4 Timer 2 - break input
- - - 5 - 5 PA5/TIM3_BKIN I/O X X X HS X X Port A5 Timer 3 - break input
-
3 - - 56
PA6/COMP_REF I/O X X X
HS X
X
Port A6
Comparator external
reference
4 4 7667
5 5 8778
6 6 9889
V_SS
S
V_DD
S
PD0/TIM3_CH2/
COMP1_CH3
I/O X
X
X
HS X
Ground
Power supply
Timer 3 - channel 2 /
X Port D0 Comparator 1 -
channel 3
-
-
-
9 9 10
PD1/TIM3_TRIG/
COMP1_CH4
I/O X
X
X
HS X
Timer 3 - trigger /
X Port D1 Comparator 1 -
channel 4
-
-
-
10 10 11
PD2/
COMP2_CH3
I/O X X X
HS X
X
Port D2
Comparator 2 -
channel 3
-
-
-
11 11 12
PD3/
COMP2_CH4
I/O X X X
HS X
X
Port D3
Comparator 2 -
channel 4
7
7
10 12 12 13
PB0/TIM2_CH1/
COMP1_CH1
I/O X
X
X
HS X
Timer 2 - channel 1 /
X Port B0 Comparator 1 -
channel 1
20/77
Doc ID 15275 Rev 7