PC4 is a normal IO pin, not for power supply. If the chip is powered, and PC4 is configured as input, it will accept logic levels. For detailed electrical characteristics see STM32L476xx data sheet.
KnarfB, I did not ask the correct question. I have a mb1136 c-04 218430905 board with the L476 chip loaded and pin OC4 is initialized to read ADC input. I need to kno if there is a way to connect my voltage generator to the PC4 pin on the board to test my analog procssing. A schematic of the board would help. I there a User Guide?
