Hi,
I am building a custom PCB using the nRF51422 chip. I need to include a pushbutton switch on the PCB to generate an interrupt when it is pressed(gpiote). I am connecting the pushbutton switch to an analogue pin. For the pushbutton, should I connect the other side of it to ground or the input voltage to the board to allow an interrupt to be generated on a button press? Also, would I need any external pull-up or pull-down resistors?
Regards, Ehsan
Hi,
Pushbuttons are usually active low, meaning the input will be connected to ground when the button is activated (pushed). So you connect one side of the button to the nRF-pin you want to use, and the other side to ground. You don’t need any external pull-up/down resistor, just configure the nRF-pin as input with active internal pull-up.
Hi,
Pushbuttons are usually active low, meaning the input will be connected to ground when the button is activated (pushed). So you connect one side of the button to the nRF-pin you want to use, and the other side to ground. You don’t need any external pull-up/down resistor, just configure the nRF-pin as input with active internal pull-up.
