Can someone tell me the proper way for J1 to be connected to the STM32 core? I've got it connected to J19 (RC1 side), and I think I've got all the pins figured out except #5. J1.1 = GND (Vs on core J19) J1.2 = +5v (Vd on core J19) J1.3 = Frame Sync (SO on core J19?) J1.4 = Digital Serial Input (RC1 on core J19?) J1.5 = Serial Clock Input (SC on core J19?) I'm beginning to think my assignment for J1.3 is wrong... maybe J1.4 should be SO on core J19, and J1.3 should be RC1? Then what