GPIO read voltage levels.

[bgarrood]

Hello,

I am trying to use an interupt from an analog devices ADXL343 accelerometer. 

With a power supply of 3.0V to my board, I only get a 2.1V on the interrupt, and I think this is not enough to read as a high value on the nordic chip.

So a couple of questions:

-What are the voltage thresholds for gpio reads?

-Is there a way to change these thresholds?

-Is there any other way to get this to work?  On the nrf52 chip the interrupts are connected to pins 9 and 10.

Many thanks

Barney

[Ashish]

Hey,

Check the electrical specifications for GPIO available in product specification for the device that you are using.

nordicsemi.com/DocLib

bgarrood said:

What are the voltage thresholds for gpio reads?

Input High Voltage for nrf52832 is 0.7xVdd. For 3V Vdd, that will be 2.1V.

bgarrood said:

Is there a way to change these thresholds?

Most probably, No

bgarrood said:

Is there any other way to get this to work?

Probably check the power to the ADXL343. It should be able to give higher output.