I'm attempting to use an output pin of the PIC to activate the Enable pin of the power regulator IC that feeds the PIC. I also want a manual push-button to be able to temporarily Enable the power regulator IC until the PIC is powered up and can resume this function. Please see the attached schematic.
My question is whether the manually applied voltage will damage the PIC, since it will be applying a voltage greater than Vdd (since it will take some time before the PIC actually gets powered up).
I know the datasheet specifies maximum of Vdd+0.3V on any pin. But scenarios such as having a capacitor on an output pin would break this rule since they'd effectively be applying a voltage on the PIC after power-down.
Additional info: Using a PIC16F1783 (contrary to what schematic shows). PIC will be powered by 3.3V output of MCP1640 IC, which in turn will be powered by 1.5V on its Vin pin. The Enable pin requires minimum 90% of Vin to activate.
My question is whether the manually applied voltage will damage the PIC, since it will be applying a voltage greater than Vdd (since it will take some time before the PIC actually gets powered up).
I know the datasheet specifies maximum of Vdd+0.3V on any pin. But scenarios such as having a capacitor on an output pin would break this rule since they'd effectively be applying a voltage on the PIC after power-down.
Additional info: Using a PIC16F1783 (contrary to what schematic shows). PIC will be powered by 3.3V output of MCP1640 IC, which in turn will be powered by 1.5V on its Vin pin. The Enable pin requires minimum 90% of Vin to activate.