hi guys, extension of this | Microcontroller › 8051 › pull up resistor › hi guys, extension of this May 12, 2012 at 7:53 am #7769 SindhuParticipant hi guys, extension of this doubt… why is the value of pull-up resistor used = 10k? for a supply of 5V, this yields a current of 0.5mA.. How does the microcontroller know whether there is a high signal or low signal on this pin?
