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
USART1_TX(8)
TIM1_CH2(8)
/
C9 30 C7 42 68 21
D10 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
TIM1_CH4(8)
C10 32 C8 44 70 23
PA11
I/O FT
I/O FT
PA11
PA12
USART1_RTS/
CANTX(8) //USBDP
TIM1_ETR(8)
B10 33 B8 45 71 24
A10 34 A8 46 72 25
PA12
PA13
I/O FT JTMS/SWDIO
Not connected
PA13
PA14
F8
-
-
-
73
-
E6 35 D5 47 74 26
F6 36 E5 48 75 27
A9 37 A7 49 76 28
VSS_2
VDD_2
PA14
S
S
VSS_2
VDD_2
I/O FT JTCK/SWCLK
TIM2_CH1_ETR/
PA15 /SPI1_NSS
A8 38 A6 50 77 29
PA15
I/O FT
JTDI
B9
B8
C8
D8
E8
B7
C7
D7
B6
C6
D6
-
-
B7 51 78
B6 52 79
C5 53 80
PC10
PC11
PC12
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
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
I/O FT
I/O FT
PD2
PD3
PD4
PD5
PD6
PD7
TIM3_ETR
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
84
85
86
87
88
-
USART2_CTS
USART2_RTS
USART2_TX
USART2_RX
USART2_CK
-
-
-
-
TIM2_CH2 / PB3
TRACESWO
SPI1_SCK
A7 39 A5 55 89 30
A6 40 A4 56 90 31
PB3
PB4
I/O FT
I/O FT
JTDO
TIM3_CH1/ PB4/
SPI1_MISO
JNTRST
30/96
Doc ID 13587 Rev 12
STMICROELECTRONICS [ ST ]
