Dear sir,
I want to connect a simple pushbutton type switch to GPIO pin configured as an input. I found that the device has internal pullups and can be enabled using GPyPUD registers.
But while checking datasheet I did not found any resister values(or impedance) for these internal pullups only found Ipullup (i.e. input current with pullups enabled) it is 150uA. then I read some TI e2e threads in which they have mentioned it is active pullup circuit. But I did not really understand its meaning.
And my question is that, What if I connect a switch directly to a ground on a GPIO i/p pin with internal pullup enabled? (will it damage my microcontroller?). Or do I need to connect resistor of some value in series to restrict excessive current? (If want to use internal pullups in my circuit.)
Can anyone please explain how to do this?
Thank You.
