This set of MSP430 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “Comparator”.
1. Comparator_A+ is controlled by which of the following peripheral registers?
a) CACTL1
b) CACTL2
c) CACTL1 & CACTL2
d) None of the mentioned
View Answer
Explanation: Comparator_A+ is controlled by the CACTL1 and the CACTL2 registers.
2. 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
View Answer
Explanation: CAON bit is used to switch on the comparator module namely, Comparator_A+.
3. 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
View Answer
Explanation: P2CA4-P2CA0 bits are used for connecting the non inverting inputs to the CA0-CA2 pins.
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
View Answer
Explanation: CAREFx bits are used for selecting the appropriate reference voltage for the comparator.
5. Which of the following bits are not actually associated with the comparator module?
a) CAREFx
b) CLLDx
c) CAON
d) CAIFG
View Answer
Explanation: CLLDx bit is related to the Timer_2 module. All others are related to the comparator module.
6. 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
View Answer
Explanation: Flag CAIFG is raised, at the falling or rising edge of the pulse that is selected by the CAIES bit.
7. 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
View Answer
Explanation: 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.
8. 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
View Answer
Explanation: CAEX is used for exchanging the two inputs of the comparator and invert its output to compensate.
9. Changes in Vcc changes the value of V+?
a) true
b) false
c) cant be said
d) depends on the conditions
View Answer
Explanation: When some variation is made in the value of Vcc, in the same manner, itself the value of the V+ changes because, the voltage from the potential divider is proportional to Vcc. This changing effect can be reduced if the similar change takes place in the value of V- itself.
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
View Answer
Explanation: The relaxation oscillator is a circuit that with the help of charging and discharging of an oscillator, help us in calculating the duration of the single RC transient.
Sanfoundry Global Education & Learning Series – Microcontroller.
To practice all areas of Microcontroller, here is complete set of 1000+ Multiple Choice Questions and Answers.
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