September 27, 2018 What to do with unused USB ports on the GEM Graphical OS Color Chip? By FAQs › Category: GEMstudio Pro › What to do with unused USB ports on the GEM Graphical OS Color Chip? 0 Vote Up Vote Down Amulet Staff asked 6 years ago If USB is not needed in the design, please ground VBUS pin. Please login or Register to submit your answer Username or Email Address Password Remember Me Share