Pullups enabled on analog inputs


Arduino Model? (example: Arduino Uno)

Arduino Uno

Arduino Ethernet / WiFi Shield? (example: Ethernet Shield W5100)

W5100 shield

Please describe the bug / issue. Attaching any relevant screenshots would be very helpful!

Trying to implement a thermistor on A0. I noticed that the internal pullup is enabled on the A0 pin. This effectively adds a 10k resistor to +5V.
I tried adding a digitalWrite(A0,LOW) to the sketch but it had no effect.


Would you mind posting the code? This is easiest way for us to reproduce any issues? Thanks!