STM32F103xx
Pin descriptions
19/67
G3
14
20
29
PA4/SPI1_NSS/
USART2_CK/ADC_IN4
I/O
PA4
SPI1_NSS
USART2_CK
H3
15
21
30
PA5/SPI1_SCK/ ADC_IN5
I/O
PA5
/ ADC_IN5
J3
16
22
31
PA6/SPI1_MISO/
ADC_IN6/TIM3_CH1
I/O
PA6
SPI1_MISO
/
ADC_IN6/TIM3_CH1
K3
17
23
32
PA7/SPI1_MOSI/
ADC_IN7/TIM3_CH2
I/O
PA7
SPI1_MOSI
/
ADC_IN7/TIM3_CH2
G4
-
24
33
PC4/ADC_IN14 I/O
PC4
ADC_IN14
H4
-
25
34
PC5/ADC_IN15 I/O
PC5
ADC_IN15
J4
18
26
35
PB0/ADC_IN8/ TIM3_CH3
I/O
PB0
ADC_IN8/TIM3_CH3
K4
19
27
36
PB1/ADC_IN9/ TIM3_CH4
I/O
PB1
ADC_IN9/TIM3_CH4
G5
20
28
37
PB2 / BOOT1
I/O
FT
PB2/BOOT1
H5
-
-
38
PE7
I/O
FT
PE7
J5
-
-
39
PE8
I/O
FT
PE8
K5
-
-
40
PE9
I/O
FT
PE9
G6
-
-
41
PE10
I/O
FT
PE10
H6
-
-
42
PE11
I/O
FT
PE11
J6
-
-
43
PE12
I/O
FT
PE12
K6
-
-
44
PE13
I/O
FT
PE13
G7
-
-
45
PE14
I/O
FT
PE14
H7
-
-
46
PE15
I/O
FT
PE15
J7
21
29
47
PB10/I2C2_SCL/
USART3_TX
I/O
FT
PB10
I2C2_SCL/USART3_TX
(5)(6)
K7
22
30
48
PB11/I2C2_SDA /
USART3_RX
I/O
FT
PB11
I2C2_SDA/
USART3_RX
(5)(6)
E7
23
31
49
V
SS_1
S
V
SS_1
F7
24
32
50
V
DD_1
S
V
DD_1
K8
25
33
51
PB12/SPI2_NSS /
I2C2_SMBAl/ USART3_CK /
TIM1_BKIN
I/O
FT
PB12
SPI2_NSS
(5)
/I2C2_SMBAl
(5)
/
USART3_CK
(5)(6)
J8
26
34
52
PB13/SPI2_SCK /
USART3_CTS /
TIM1_CH1N
I/O
FT
PB13
SPI2_SCK
(5)
/
USART3_CTS
TIM1_CH1N
H8
27
35
53
PB14/SPI2_MISO /
USART3_RTS /
TIM1_CH2N
I/O
FT
PB14
SPI2_MISO
(5)
/USART3_RTS
(5)(6)
TIM1_CH2N
Table 3.
Pin definitions (continued)
Pins
Pin name
Ty
p
e
(1
)
I /
O
Le
vel
(2)
Main function
(3)
(after reset)
Default alternate functions
BGA100
LQ
FP48
LQ
FP64
LQ
FP10
0