Datasheet

Pinout and pin description
STM8S105xx
Table 6: Pin description for STM8S105 microcontrollers
Pin number
Pin name
Type
Input Output Main
function
(after
reset)
Default alternate
function
Alternate function
after remap
[option bit]
LQFP48 LQFP44
LQFP32/
UFQFPN32
SDIP32
floating
wpu
Ext. interrupt
High sink
Speed
OD
PP
1 1 1 6 NRST I/O
X
Reset
2 2 2 7 PA1/ OSC IN I/O
X
X O1 X X
Port A1
Resonator crystal in
3 3 3 8 PA2/ OSC OUT I/O
X
X X O1 X X
Port A2
Resonator crystal out
4 4 - - V
SSIO_1
S I/O ground
5 5 4 9 V
SS
S Digital ground
6 6 5 10 VCAP S 1.8 V regulator capacitor
7 7 6 11 V
DD
S Digital power supply
8 8 7 12 V
DDIO_1
S I/O power supply
9 - - - PA3/ TIM2 _CH3
[TIM3 _CH1]
I/O
X
X X O1 X X
Port A3
Timer 2 - channel 3 TIM3_CH1 [AFR1]
10 9 - - PA4 I/O
X
X X HS O3 X X
Port A4
11 10 - - PA5 I/O
X
X X HS O3 X X
Port A5
12 11 - - PA6 I/O
X
X X HS O3 X X
Port A6
- - 8 13 PF4/ AIN12
(1)
I/O
X
X O1 X X
Port F4
Analog input 12
(2)
13 12 9 14 V
DDA
S Analog power supply
14 13 10 15 V
SSA
S Analog ground
15 14 - - PB7/ AIN7 I/O
X
X X O1 X X
Port B7
Analog input 7
16 15 - - PB6/ AIN6 I/O
X
X X O1 X X
Port B6
Analog input 6
17 16 11 16 PB5/ AIN5
[I
2
C_ SDA]
I/O
X
X X O1 X X
Port B5
Analog input 5
I
2
C_SDA [AFR6]
18 17 12 17 PB4/ AIN4
[I
2
C_ SCL]
I/O
X
X X O1 X X
Port B4
Analog input 4
I
2
C_SCL [AFR6]
19 18 13 18 PB3/ AIN3
[TIM1_ ETR]
I/O
X
X X O1 X X
Port B3
Analog input 3
TIM1_ETR [AFR5]
20 19 14 19 PB2/ AIN2
[TIM1_CH3N]
I/O
X
X X O1 X X
Port B2
Analog input 2
TIM1_CH3N [AFR5]
21 20 15 20 PB1/ AIN1
[TIM1_CH2N]
I/O
X
X X O1 X X
Port B1
Analog input 1
TIM1_ CH2N [AFR5]
22 21 16 21 PB0/ AIN0
[TIM1_CH1N]
I/O
X
X X O1 X X
Port B0
Analog input 0 TIM1_CH1N [AFR5]
23 - - - PE7/ AIN8 I/O
X
X X O1 X X
Port E7
Analog input 8
24 22 - - PE6/ AIN9 I/O
X
X X O1 X X
Port E6
Analog input 9
(3)
25 23 17 22 PE5/SPI_NSS I/O
X
X X O1 X X
Port E5
SPI master/slave select
26 24 18 23 PC1/ TIM1_CH1
UART2_CK
I/O
X
X X HS O3 X X
Port C1
Timer 1 – channel 1/
UART2 synchronous
clock
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