STM32F103xx
Pin descriptions
Table 3.
Pins
Pin definitions (continued)
Main function(3)
(after reset)
Pin name
Default alternate functions
PA4/SPI1_NSS/
USART2_CK/ADC_IN4
SPI1_NSS(6)
/
G3 14 20 29
I/O
PA4
PA5
PA6
USART2_CK(6)/ ADC_IN4
SPI1_SCK(6)/ ADC_IN5
H3 15 21 30 PA5/SPI1_SCK/ ADC_IN5 I/O
PA6/SPI1_MISO/
ADC_IN6/TIM3_CH1
SPI1_MISO(6)
ADC_IN6/TIM3_CH1(6)
/
J3 16 22 31
K3 17 23 32
I/O
I/O
PA7/SPI1_MOSI/
ADC_IN7/TIM3_CH2
SPI1_MOSI(6)
/
PA7
ADC_IN7/TIM3_CH2(6)
G4
H4
-
-
24 33
25 34
PC4/ADC_IN14
PC5/ADC_IN15
I/O
I/O
PC4
PC5
ADC_IN14
ADC_IN15
J4 18 26 35 PB0/ADC_IN8/ TIM3_CH3 I/O
K4 19 27 36 PB1/ADC_IN9/ TIM3_CH4 I/O
PB0
ADC_IN8/TIM3_CH3(6)
ADC_IN9/TIM3_CH4(6)
PB1
G5 20 28 37
PB2 / BOOT1
PE7
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
FT
FT
FT
FT
FT
FT
FT
FT
FT
FT
PB2/BOOT1
PE7
H5
J5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
38
39
40
41
42
43
44
45
46
PE8
PE8
K5
G6
H6
J6
PE9
PE9
PE10
PE11
PE12
PE13
PE14
PE15
PE10
PE11
PE12
PE13
PE14
PE15
K6
G7
H7
PB10/I2C2_SCL/
USART3_TX
J7 21 29 47
K7 22 30 48
I/O
I/O
FT
FT
PB10
PB11
I2C2_SCL/USART3_TX(5)(6)
PB11/I2C2_SDA /
USART3_RX
I2C2_SDA/
USART3_RX(5)(6)
E7 23 31 49
F7 24 32 50
VSS_1
VDD_1
S
S
VSS_1
VDD_1
SPI2_NSS(5)
PB12/SPI2_NSS /
K8 25 33 51 I2C2_SMBAl/ USART3_CK / I/O
TIM1_BKIN
/I2C2_SMBAl(5)
/
FT
PB12
USART3_CK(5)(6)
TIM1_BKIN(6)
/
PB13/SPI2_SCK /
USART3_CTS /
TIM1_CH1N
SPI2_SCK(5)
/
J8 26 34 52
H8 27 35 53
I/O
I/O
FT
FT
PB13
PB14
USART3_CTS(5)(6)
TIM1_CH1N (6)
/
PB14/SPI2_MISO /
USART3_RTS /
TIM1_CH2N
SPI2_MISO(5)
/USART3_RTS(5)(6)
TIM1_CH2N (6)
19/67
STMICROELECTRONICS [ ST ]
