I have a question regarding pull-up of GPIO pins.
I'm currently working with Atmel's Cortex-M3 board, which has "embedded pull-up/ pull-down" registers for all GPIO lines.
I know about resistor pull-ups / pull-downs, which is used to keep the current from flowing.
What's the difference, why do I need this kind of functionality from the micro-controller, and for which purpose ?
I'm currently working with Atmel's Cortex-M3 board, which has "embedded pull-up/ pull-down" registers for all GPIO lines.
I know about resistor pull-ups / pull-downs, which is used to keep the current from flowing.
What's the difference, why do I need this kind of functionality from the micro-controller, and for which purpose ?