STM32F103x8, STM32F103xB
Pinouts and pin description
Alternate functions(4)
Table 5.
Medium-density STM32F103xx pin definitions (continued)
Pins
Main
Pin name
function(3)
(after reset)
Default
Remap
F9 E10
E9 D12
E8 39 65
D8 40 66
-
-
PC8
PC9
I/O FT
I/O FT
PC8
PC9
TIM3_CH3
TIM3_CH4
-
USART1_CK/
TIM1_CH1(8)/MC
O
D9 D11 29 D7 41 67 20
PA8
I/O FT
PA8
USART1_TX(8)
TIM1_CH2(8)
/
C9 D10 30 C7 42 68 21
D10 C12 31 C6 43 69 22
PA9
I/O FT
I/O FT
PA9
USART1_RX(8)
TIM1_CH3(8)
/
PA10
PA10
USART1_CTS/
CANRX(8)
USBDM
/
C10 B12 32 C8 44 70 23
PA11
I/O FT
I/O FT
PA11
PA12
TIM1_CH4(8)
USART1_RTS/
CANTX(8)
B10 A12 33 B8 45 71 24
A10 A11 34 A8 46 72 25
PA12
PA13
//USBDP
TIM1_ETR(8)
I/O FT JTMS/SWDIO
Not connected
PA13
PA14
F8 C11
-
-
-
73
-
E6 F11 35 D5 47 74 26
F6 G11 36 E5 48 75 27
A9 A10 37 A7 49 76 28
VSS_2
VDD_2
PA14
S
S
VSS_2
VDD_2
I/O FT JTCK/SWCLK
TIM2_CH1_ET
R/ PA15
A8 A9 38 A6 50 77 29
PA15
I/O FT
JTDI
/SPI1_NSS
B9 B11
B8 C10
C8 B10
D8 C9
E8 B9
B7 C8
C7 B8
D7 B7
B6 A6
-
-
B7 51 78
B6 52 79
C5 53 80
PC10
PC11
PC12
PD0
PD1
PD2
PD3
PD4
PD5
I/O FT
I/O FT
I/O FT
PC10
PC11
PC12
USART3_TX
USART3_RX
USART3_CK
CANRX
-
5
6
C1
D1
5
6
81
82
2
3
-
I/O FT OSC_IN(9)
I/O FT OSC_OUT(9)
CANTX
B5 54 83
I/O FT
I/O FT
I/O FT
I/O FT
PD2
PD3
PD4
PD5
TIM3_ETR
-
-
-
-
-
-
-
-
-
84
85
86
-
USART2_CTS
USART2_RTS
USART2_TX
-
-
Doc ID 13587 Rev 14
31/102
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