I am working with the Atmel SAM4E16E microcontroller. I have been reading the datasheet trying to familiarize myself with it. Certain pins are described in the datasheet as being connected to an internal pull-down resistor. For example, the NRST pin is connected to an internal pull-down resistor, and will reset the chip if it is pulled high. So if I connect the reset pin to a pushbutton (normally opened) which goes 3V, then pushing the button will reset the chip.
In this situation, I would normally add a pull-down resistor to the circuit. But since the microcontroller already has an internal pull-down resistor on that pin, do I still want to?
From my understanding, doing so would result in having the two resistors being in parallel, therefore reducing their resistance. But I just would like to confirm this.
In this situation, I would normally add a pull-down resistor to the circuit. But since the microcontroller already has an internal pull-down resistor on that pin, do I still want to?
From my understanding, doing so would result in having the two resistors being in parallel, therefore reducing their resistance. But I just would like to confirm this.