Pinouts and pin description
Table 5.
STM32F103x8, STM32F103xB
Medium-density STM32F103xx pin definitions (continued)
Pins
Alternate functions
(4)
I / O Level
(2)
LQFP48/VFQFPN48
VFQFPN36
LFBGA100
TFBGA64
LQFP100
LQFP64
Pin name
Main
function
(3)
(after reset)
Type
(1)
Default
Remap
C9
30
C7
C6
42
43
68
69
21
22
PA9
PA10
I/O FT
I/O FT
PA9
PA10
USART1_TX
(8)
/
TIM1_CH2
(8)
USART1_RX
(8)
/
TIM1_CH3
(8)
USART1_CTS/
CANRX
(8)
/ USBDM
TIM1_CH4
(8)
USART1_RTS/
CANTX
(8)
//USBDP
TIM1_ETR
(8)
PA13
D10 31
C10 32
C8
44
70
23
PA11
I/O FT
PA11
B10 33
A10 34
F8
E6
F6
A9
A8
B9
B8
C8
D8
E8
B7
C7
D7
B6
C6
D6
A7
-
-
-
-
-
39
-
35
36
37
38
-
-
-
5
6
B8
A8
-
D5
E5
A7
A6
B7
B6
C5
C1
D1
B5
-
-
-
-
-
A5
45
46
-
47
48
49
50
51
52
53
5
6
54
-
-
-
-
-
55
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
24
25
-
26
27
28
29
PA12
PA13
I/O FT
PA12
I/O FT JTMS/SWDIO
Not connected
V
SS_2
V
DD_2
PA14
PA15
PC10
PC11
PC12
S
S
V
SS_2
V
DD_2
PA14
TIM2_CH1_ETR/
PA15 /SPI1_NSS
USART3_TX
USART3_RX
USART3_CK
CANRX
CANTX
TIM3_ETR
USART2_CTS
USART2_RTS
USART2_TX
USART2_RX
USART2_CK
TIM2_CH2 / PB3
TRACESWO
SPI1_SCK
TIM3_CH1/ PB4/
SPI1_MISO
I/O FT JTCK/SWCLK
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
JTDI
PC10
PC11
PC12
OSC_IN
(9)
2
3
-
-
-
-
-
-
30
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PB3
I/O FT OSC_OUT
(9)
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
PD2
PD3
PD4
PD5
PD6
PD7
JTDO
A6
40
A4
56
90
31
PB4
I/O FT
JNTRST
30/96
Doc ID 13587 Rev 12
STMICROELECTRONICS [ STMICROELECTRONICS ]
