User manual

EXTERNAL CONNECTORS DESCRIPTION:
UEXT:
Pin # Signal Name
1 VCC
2 GND
3 RXD
4 TXD
5 SCL
6 SDA
7 MISO
8 MOSI
9 SCK
10 #SS
USB
Pin # Signal Name
1 USB_POWER
2 D-/PGC
3 D+/PGD
4 Not Connected
5 GND
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