Interfacing with RTC MCQ’s

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

1. DS12887 has _____ amount of RAM.
a) 14 bytes
b) 114 bytes
c) 128 bytes
d) 64 bytes

2. DS12887 has _____ amount of RAM for general purpose applications.
a) 9 bytes
b) 114 bytes
c) 128 bytes
d) 14 bytes

3. DS12887 is a ____________
a) Timer IC
b) Serial communication IC
c) RTC IC
d) Motor

4. In DS12887, which bits of the Register A are used to turn on the oscillator?
a) D4
b) D5
c) D6
d) All of the mentioned

5. In DS12887, what is correct about the UIP bit of the register A?
a) it is a read only bit
b) it is used to know about the result
c) it is used to select the DS12887 datasheet
d) all of the mentioned

6. Is DS12887 has non-volatile RAM?
a) Yes
b) No
c) Can’t be determined
d) None of the mentioned

7. In DS12887, which out of the following is correct about the SQW pin?
a) it is an output pin
b) it can provide up to 15 different square waves
c) the frequency of the square wave is set by the register A
d) all of the mentioned are correct

8. In DS12887, what is the range of RAM addresses which are used to store the values of time, calendar and alarm data?
a) 00-7FH
b) 00-09H
c) 0EH-7FH
d) 0A-0DH

9. Name the read only registers are present in the DS12887?
a) register A, register B
b) register B, register C
c) register C, register D
d) register D, register A

10. In DS12887, when the external source is turned-off, how does DS12887 get power to retain its data?
a) Internal Lithium Battery
b) Internal Lead Battery
c) Additional external Alkaline Battery
d) Additional external Lithium Battery

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