Ch 6

Question 1

Why is a pull up resistor required in a push button circuit that connects the pin to ground when pressed?

Answer 1

To set a defined high voltage level when the button is open(not pressed) and to avoid any floating pins

Question 2

How to you enable the AVRs internal pull up resistor?

Answer 2

By setting the corresponding bit in the PORT register to 1

Question 3

Which specific register is read from to get the digital voltage values(the input state) on the pin?

Answer 3

The PIN register

Question 4

What describes the rapid, fake electrical contact fluctuations that occur when a switch is physically pressed or released?

Answer 4

Button Bounce

Question 5

What solution is often used in software to denounce a button press?

Answer 5

To implement a delay time