I don't realy understand where are pins connected when either input/output is set or when output is set as 1 or 0.
Does mcu have current limiting resistor when pin is set to input or must an externaly be addes? What is the current limit for input pin (I know for output is 25 or 50 mA)?
Can a 5V pnp be controled directly via output pin?
Can a pfet be controled directly (mcu sinking pfet base current)?
Does mcu have current limiting resistor when pin is set to input or must an externaly be addes? What is the current limit for input pin (I know for output is 25 or 50 mA)?
Can a 5V pnp be controled directly via output pin?
Can a pfet be controled directly (mcu sinking pfet base current)?