Hardware and layout UM1658
24/39 DocID025097 Rev 1
VSS_1 63
VSS_2 31
VSSA 12
5V 1
3V 1
VDD
5
GND
22
GND
GND
3
GND
9
GND
33 33
Table 5. MCU pin description versus board function (continued)
MCU pin Board function
Main
function
Alternate
functions
LQFP64
Push button
LED
SWD
OSC
Free I/O
Power supply
CN3
P1
P2
