MOD5270 GPIO help

[nageshpolu]

Hi,

I have a question regarding the Netburner’s MOD5270 GPIO. I made one of the digital I/O pin to be an input, but I can see a voltage of 3.3V at the pin. Is there way that I don’t see any voltage on the pin if it set as input.

Please help me with this issue.

Thanks.

Best regards,
Nagesh Polu

[liugera]

Hello mate,

what you should do is to wire the input pin to a signal... 1 or 0... or any value between 0 and 5 volts if you are using the analog inputs...

greets

[yevgenit]

GPIO pins have a weak pull-up to +3.3V. Adding your own pull-down resistor will bring the floating voltage to almost zero. 1 kOhm is a good value.
Regularly, you don't need such a pull-down, due to the driver of your signal source is strong enough to overkome the on-chip weak pull-up.

I have a question regarding the Netburner’s MOD5270 GPIO. I made one of the digital I/O pin to be an input, but I can see a voltage of 3.3V at the pin. Is there way that I don’t see any voltage on the pin if it set as input.