Pinouts and pin description
STM32F103x8, STM32F103xB
Alternate functions(4)
Table 5.
Medium-density STM32F103xx pin definitions
Pins
Main
Pin name
function(3)
(after reset)
Default
Remap
A3 B2
B3 A1
C3 B1
D3 C2
E3 D2
B2 E2
-
-
-
-
1
2
3
4
5
6
-
-
-
-
-
-
PE2
PE3
PE4
PE5
PE6
VBAT
I/O FT
I/O FT
I/O FT
I/O FT
I/O FT
S
PE2
PE3
PE4
PE5
PE6
VBAT
TRACECK
TRACED0
TRACED1
TRACED2
TRACED3
-
-
-
-
-
-
1
B2
A2
A1
B1
1
PC13-TAMPER-
RTC(5)
A2 C1
A1 D1
B1 E1
2
3
4
2
3
4
7
8
9
-
-
-
I/O
PC13(6)
PC14(6)
PC15(6)
TAMPER-RTC
OSC32_IN
PC14-OSC32_IN(5) I/O
PC15-
I/O
OSC32_OUT
OSC32_OUT(5)
C2 F2
D2 G2
C1 F1
D1 G1
E1 H2
F1 H1
F2 J2
E2 J3
F3 K2
G1 J1
H1 K1
J1 L1
K1 M1
-
-
-
-
10
11
12
13
14
15
16
-
-
VSS_5
VDD_5
OSC_IN
OSC_OUT
NRST
PC0
S
S
VSS_5
VDD_5
OSC_IN
OSC_OUT
NRST
PC0
-
-
5
6
7
-
C1
D1
E1
E3
E2
5
6
7
8
9
2
3
4
-
I
PD0(7)
PD1(7)
O
I/O
I/O
I/O
I/O
I/O
S
ADC12_IN10
ADC12_IN11
ADC12_IN12
ADC12_IN13
-
-
PC1
PC1
-
F2 10 17
-
PC2
PC2
(8)
-
-
11 18
-
PC3
PC3
8
-
F1 12 19
5
-
VSSA
VSSA
-
-
-
20
21
VREF-
VREF+
VDDA
S
VREF-
VREF+
VDDA
-
G1(8)
-
S
9
H1 13 22
6
S
WKUP/
USART2_CTS(9)
ADC12_IN0/
TIM2_CH1_
ETR(9)
/
G2 L2 10 G2 14 23
7
8
PA0-WKUP
PA1
I/O
I/O
PA0
PA1
USART2_RTS(9)
ADC12_IN1/
/
H2 M2 11 H2 15 24
TIM2_CH2(9)
28/105
Doc ID 13587 Rev 15