User manual

EXTENSION 2
Pin # Signal Name Pin # Signal Name
1 VDDA 2 PC2
3 GNDA 4 PA0/BUT
5 3.3V 6 GND
7 PA2/UART2.TX 8 PA1
9 PC3 10 PA3/UART2.RX
11 PA4/SPI1.NSS 12 PC4/USB-P
13 PC5 14 PB10/UART3.TX
15 P11/UART3.RX 16 PB13/SPI2.SCK
17 PB12/SPI2.NSS/I2C.SMBA 18 PB14/SPI2.MISO
19 PB15/SPI2.MOSI 20 PC6
21
PC7 22 PC8
23 +5V USB 24 PC9
25 GND 26 VIN
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