Explore topic-wise MCQs in 8051 Microcontroller.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your 8051 Microcontroller knowledge and support exam preparation. Choose a topic below to get started.

1.

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
Answer» D. register D, register A
Discussion
2.

What_is_the_supply_that_a_DS12887_consumes_even_when_the_power_is_switched_off?$

A. Lithium ion battery
B. Lead battery
C. Lithium ion & Lead battery
D. None of the mentioned
Answer» B. Lead battery
Discussion
3.

Are the RAM locations of the DS12887 non volatile?

A. Yes
B. No
C. Can’t be determined
D. None of the mentioned
Answer» B. No
Discussion
4.

What is the byte address where time, calendar, alarm address locations etc are kept?

A. 00-7FH
B. 0-9
C. 0-13
D. none of the mentioned
Answer» C. 0-13
Discussion
5.

What is correct about the UIP pin 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
Answer» B. it is used to know about the result
Discussion
6.

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
Answer» E.
Discussion
7.

Which bits of the Register A is used for turning on the oscillator?

A. D4
B. D5
C. D6
D. All of the mentioned
Answer» E.
Discussion
8.

How many bytes of the ROM are there for the general purpose applications?

A. 9
B. 114
C. 128
D. none of the mentioned
Answer» C. 128
Discussion
9.

What is the RAM space that a DS12887 have?

A. 128 bytes
B. from 00-7FH
C. 128 bytes from 00-7FH
D. none of the mentioned
Answer» E.
Discussion
10.

DS12887 is a ____________

A. Timer IC
B. Serial communication IC
C. RTC IC
D. Motor
Answer» D. Motor
Discussion