STM32F103x8, STM32F103xB
Table 5.
Pinouts and pin description
Medium-density STM32F103xx pin definitions (continued)
Pins
LQFP48/UFQFPN48
I / O Level
(2)
Alternate functions
(4)
VFQFPN36
LFBGA100
TFBGA64
UFBG100
LQFP100
LQFP64
Pin name
Main
function
(3)
(after reset)
Type
(1)
Default
Remap
D9 D11 29
D7
41
67
20
PA8
I/O FT
PA8
USART1_CK/
TIM1_CH1
(9)
/
MCO
USART1_TX
(9)
/
TIM1_CH2
(9)
USART1_RX
(9)
/
TIM1_CH3
(9)
USART1_CTS/
CANRX
(9)
/
USBDM/
TIM1_CH4
(9)
USART1_RTS/
CANTX
(9)
/USBDP
TIM1_ETR
(9)
PA13
C9 D10 30
D10 C12 31
C7
C6
42
43
68
69
21
22
PA9
PA10
I/O FT
I/O FT
PA9
PA10
C10 B12 32
C8
44
70
23
PA11
I/O FT
PA11
B10 A12 33
B8
45
71
24
PA12
I/O FT
PA12
A10 A11 34
F8 C11
E6 F11
-
35
A8
-
D5
E5
A7
A6
B7
B6
C5
C1
D1
B5
46
-
47
48
49
50
51
52
53
-
-
54
-
-
-
-
-
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
25
-
26
27
28
29
PA13
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
F6 G11 36
A9 A10 37
A8
A9
38
-
-
-
-
-
I/O FT JTCK/SWCLK
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
JTDI
PC10
PC11
PC12
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
B9 B11
B8 C10
C8 B10
-
-
B7
C7
D7
B6
C6
D6
C9
B9
C8
B8
B7
A6
B6
A5
2
3
-
-
-
-
-
-
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
-
-
-
-
-
-
-
-
-
-
Doc ID 13587 Rev 15
31/105
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