Comparator MCQ’s

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This set of Microcontroller Multiple Choice Questions & Answers (MCQs) focuses on “Comparator”.

1. CAON bit is used to ___________
a) start a timer
b) start an A/D conversion
c) switch on the comparator module
d) switch on the bit transmission

2. P2CA4-P2CA0 bits are used for _______
a) giving the power supply to the comparator module
b) for selecting the mode of operation of the comparator
c) for connecting the non inverting inputs to the CA0-CA2 pins
d) all of the mentioned

3. Comparator_A+ is controlled by which of the following peripheral registers?
a) CACTL1
b) CACTL2
c) CACTL1 & CACTL2
d) None of the mentioned

4. CAREFx bits are used for _______
a) inputting a positive reference voltage
b) inputting a negative reference voltage
c) selecting the internal reference voltage
d) all of the mentioned

5. Flag CAIFG is raised,
a) at a low level triggered pulse
b) at a high level triggered pulse
c) at the falling and rising edge of the pulse
d) at the falling or rising edge of the pulse

6. Which bit is used for exchanging the two inputs of the comparator and invert its output to compensate?
a) CAIFG
b) CASHORT
c) CAPD
d) CAEX

7. Which of the following bits are not actually associated with the comparator module?
a) CAREFx
b) CLLDx
c) CAON
d) CAIFG

8. Setting a bit in the Port Disable register CAPD causes the circuits for the usual digital input and output buffers to be disconnected from the appropriate pin.
a) true
b) false
c) cant be said
d) depends on the conditions

9. Changes in Vcc changes the value of V+?
a) true
b) false
c) cant be said
d) depends on the conditions

10. The relaxation oscillator circuit helps in _______
a) calculating the duration single RC transient
b) setting the reference voltage
c) setting the clock frequency
d) calculating the conversion speed

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