Pinouts and pin description
STM32F103x8, STM32F103xB
Alternate functions(4)
Table 5.
Medium-density STM32F103xx pin definitions (continued)
Pins
Main
Pin name
function(3)
(after reset)
Default
Remap
J6 L9
K6 M10
G7 M11
H7 M12
-
-
-
-
-
-
-
-
-
-
-
-
43
44
45
46
-
-
-
-
PE12
PE13
PE14
PE15
I/O FT
I/O FT
I/O FT
I/O FT
PE12
PE13
PE14
PE15
TIM1_CH3N
TIM1_CH3
TIM1_CH4
TIM1_BKIN
I2C2_SCL/
J7 L10 21 G7 29 47
K7 L11 22 H7 30 48
-
-
PB10
PB11
I/O FT
I/O FT
PB10
PB11
TIM2_CH3
TIM2_CH4
USART3_TX(8)
I2C2_SDA/
USART3_RX(8)
E7 F12 23 D6 31 49 18
F7 G12 24 E6 32 50 19
VSS_1
VDD_1
S
S
VSS_1
VDD_1
SPI2_NSS/
I2C2_SMBAl/
K8 L12 25 H8 33 51
-
-
PB12
PB13
I/O FT
I/O FT
PB12
PB13
USART3_CK(8)
TIM1_BKIN(8)
/
SPI2_SCK/
USART3_CTS(8)
/
J8 K12 26 G8 34 52
TIM1_CH1N (8)
SPI2_MISO/
USART3_RTS(8)
TIM1_CH2N (8)
H8 K11 27 F8 35 53
G8 K10 28 F7 36 54
-
-
PB14
PB15
I/O FT
I/O FT
PB14
PB15
SPI2_MOSI/
TIM1_CH3N(8)
K9 K9
J9 K8
H9 J12
G9 J11
-
-
-
-
-
-
-
-
-
-
-
-
55
56
57
58
-
-
-
-
PD8
PD9
I/O FT
I/O FT
I/O FT
I/O FT
PD8
PD9
USART3_TX
USART3_RX
USART3_CK
USART3_CTS
PD10
PD11
PD10
PD11
TIM4_CH1 /
USART3_RTS
K10 J10
-
-
-
59
-
PD12
I/O FT
PD12
J10 H12
H10 H11
G10 H10
F10 E12
E10 E11
-
-
-
-
-
-
-
-
-
-
60
61
62
-
-
-
-
-
PD13
PD14
PD15
PC6
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
PD13
PD14
PD15
PC6
TIM4_CH2
TIM4_CH3
TIM4_CH4
TIM3_CH1
TIM3_CH2
F6 37 63
E7 38 64
PC7
PC7
30/102
Doc ID 13587 Rev 14
STMICROELECTRONICS [ ST ]
