Extension connectors
Table 8. MCU pin description versus board function (continued)
MCU pin
Main
Alternate
function
functions
SPI2_NSS/I2C2_S
MBA/
USART3_CK/LCD_
PB12
SEG12/ADC_IN18/
COMP1_INP/
TIM10_CH1
SPI2_SCK/USART
3_CTS/
LCD_SEG13/ADC_
PB13
IN19/
COMP1_INP/TIM9
_CH1
SPI2_MISO/USAR
T3_RTS/LCD_SEG
PB14
14/ADC_IN20/
COMP1_INP/TIM9
_CH2
SPI2_MOSI/TIM1_
CH3N/
LCD_SEG15/ADC_
PB15
IN21/
COMP1_INP/TIM1
1_CH1/
RTC_50_60Hz
ADC_IN10/LCD_S
PC0
EG18/
COMP1_INP
ADC_IN11/LCD_S
PC1
EG19/
COMP1_INP
ADC_IN12/LCD_S
PC2
EG20/
COMP1_INP
ADC_IN13/LCD_S
PC3
EG21/
COMP1_INP
ADC_IN14/LCD_S
PC4
EG22/
COMP1_INP
ADC_IN15/LCD_S
PC5
EG23/
COMP1_INP
28/38
LQF
Linear
Push
P64
LCD
Touch
butt
pin
glass
Sensor
num
SEG
33
-
8
SEG
34
-
9
SEG
35
-
10
SEG
36
-
11
SEG
8
-
14
SEG
9
-
15
SEG
10
-
16
SEG
11
-
17
24
-
PC4
25
-
PC5
DocID018789 Rev 4
Board function
I
LED SWD OSC
DD
on
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UM1079
Pow
Free
er
P1 P2
I/O
supp
ly
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24
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25
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26
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27
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11
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12
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13
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14
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