Extension connectors
UM1079
26/38
DocID018789 Rev 4
PA5
SPI1_SCK/ADC_IN
5/ DAC_OUT2/
TIM2_CH1_ETR/C
OMP1_INP
21
-
-
-
-
-
-
-
X
-
20
-
PA6
SPI1_MISO/ADC_I
N6/
TIM3_CH1/TIM1_B
KIN/
LCD_SEG3/TIM10
_CH1/
COMP1_INP
22
-
PA6
-
-
-
-
-
-
-
-
-
PA7
SPI1_MOSI/ADC_I
N7/
TIM3_CH2/TIM1_C
H1N
/LCD_SEG4/TIM11
_CH1/
COMP1_INP
23
-
PA7
-
-
-
-
-
-
-
-
-
PA8
USART1_CK/MCO/
LCD_COM0
41
COM
0
-
-
-
-
-
-
-
-
-
23
PA9
USART1_TX/LCD_
COM1
42
COM
1
-
-
-
-
-
-
-
-
-
22
PA10
USART1_RX/LCD_
COM2
43
COM
2
-
-
-
-
-
-
-
-
-
21
PA11
USART1_CTS/US
BDM/ SPI1_MISO
44
-
-
-
-
-
-
-
X
-
-
20
PA12
USART1_RTS/US
BDP/ SPI1_MOSI
45
-
-
-
-
-
-
-
X
-
-
19
JTMS/
SWDIO
PA13
46
-
-
-
-
-
SWD
IO
-
-
-
-
18
JTCK/
SWCLK
PA14
49
-
-
-
-
-
SW
CLK
-
-
-
-
17
JTDI
TIM2_CH1_ETR/P
A15/
SPI1_NSS/LCD_S
EG17
50
SEG
12
-
-
-
-
-
-
-
-
-
16
PB0
ADC_IN8/TIM3_CH
3/
LCD_SEG5/COMP
1_INP/ VREF_OUT
26
-
PB0
-
-
-
-
-
-
-
-
-
Table 8. MCU pin description versus board function (continued)
MCU pin
Board function
Main
function
Alternate
functions
LQF
P64
pin
num
LCD
glass
Linear
Touch
Sensor
Push
butt
on
I
DD
LED SWD OSC
Free
I/O
Pow
er
supp
ly
P1 P2