Pin descriptions
STM32F103xC, STM32F103xD, STM32F103xE
Table 4.
Pin definitions (continued)
Pins
Alternate functions
Main
Pin name
function(3)
(after reset)
Default
Remap
USART1_CTS/CANRX
TIM1_CH4(6)/USBDM
C12 C10 44 70 103
B12 B10 45 71 104
PA11
PA12
I/O FT
I/O FT
PA11
PA12
USART1_RTS/USBDP/
CANTX(6)/TIM1_ETR(6)
A12 A10 46 72 105 PA13/JTMS-SWDIO I/O FT JTMS-SWDIO
C11 F8 73 106 Not connected
PA13
-
G9 E6 47 74 107
F9 F6 48 75 108
V
S
S
V
SS_2
DD_2
SS_2
DD_2
V
V
A11 A9 49 76 109 PA14/JTCK-SWCLK I/O FT JTCK-SWCLK
PA14
PA15/SPI3_NSS/
I2S3_WS
TIM2_CH1_ETR
SPI1_NSS
A10 A8 50 77 110
PA15/JTDI
I/O FT
JTDI
B11 B9 51 78 111
B10 B8 52 79 112
C10 C8 53 80 113
PC10
PC11
PC12
PD0
I/O FT
I/O FT
I/O FT
PC10
PC11
PC12
UART4_TX/SDIO_D2
UART4_RX/SDIO_D3
UART5_TX/SDIO_CK
FSMC_D2
USART3_TX
USART3_RX
USART3_CK
CANRX
(7)
E10 D8
D10 E8
5
6
81 114
82 115
I/O FT OSC_IN
(7)
PD1
I/O FT OSC_OUT
FSMC_D3
CANTX
TIM3_ETR/UART5_RX
SDIO_CMD
E9 B7 54 83 116
PD2
I/O FT
PD2
D9 C7
C9 D7
B9 B6
-
-
-
-
-
-
84 117
85 118
86 119
PD3
PD4
PD5
I/O FT
I/O FT
I/O FT
S
PD3
PD4
PD5
FSMC_CLK
FSMC_NOE
FSMC_NWE
USART2_CTS
USART2_RTS
USART2_TX
E7
F7
-
-
-
-
120
121
V
SS_10
DD_10
V
S
A8 C6
A9 D6
87 122
88 123
PD6
PD7
I/O FT
PD6
PD7
FSMC_NWAIT
USART2_RX
USART2_CK
FSMC_NE1/
FSMC_NCE2
-
-
-
I/O FT
I/O FT
I/O FT
FSMC_NE2/
FSMC_NCE3
E8
D8
-
-
-
-
124
125
PG9
FSMC_NCE4_1/
FSMC_NE3
PG10
C8
B8
D7
C7
E6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
126
127
128
129
130
PG11
PG12
PG13
PG14
VSS_11
I/O FT
I/O FT
I/O FT
I/O FT
S
FSMC_NCE4_2
FSMC_NE4
FSMC_A24
FSMC_A25
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STMICROELECTRONICS [ ST ]
