Re: Purpose of Diodes in PIC32MM USB Curiosity Dev Board
I've noticed something similar on their other development boards. It seems to be so the board can be power by either USB port while preventing both power sources from being directly connected to each other.
MacBook Pro (Retina, 15-inch, Mid 2015) with MacOS Mojave (10.14.6) and MPLAB X IDE v5.30
Curiosity PIC32MZ EF 1 & 2, PIC24F Curiosity, XPRESS EVAL BOARD (PIC16F18855), SAMA5D3 Xplained and various custom boards.