Ch 7

Question 1

What is the purpose of the ADC?

Answer 1

To convert a continuous analog voltage into a digital number

Question 2

How is an analog sensor typically connected to the ADC input pin(eg PC0)?(don’t worry about )

Answer 2

By using a voltage divider circuit

Question 3

What is the primary disadvantage of using the single conversion mode(one at a time) if you are trying to sample continuously?

Answer 3

It requires the CPU to execute the code to start and wait for each conversion individually

Question 4

What is the term for the internal circuit that allows multiple pins to share the single ADC hardware?

Answer 4

The multiplexer(MUX)

Question 5

Besides the I/O pin used, what critical parameter must be set in the ADMUX register to define the scale of the measurement?

Answer 5

Voltage Refernce;AVCC or the internal 1.1 V refernce