Embedded System Timer MCQ Quiz – Objective Question with Answer for Embedded System Timer

11. Which mode of Intel timer 8253 provides a software watchdog timer?

A. rate generator
B. hardware triggered strobe
C. square wave rate generator
D. software triggered strobe

Answer: D

The software-triggered strobe can be used as a software-based watchdog timer in which the output is connected to a nonmaskable interrupt.

 

12. Which of the following mode is similar to mode 4 of the 8253 timers?

A. mode 5
B. mode 6
C. mode 0
D. mode 1

Answer: A

Mode 5 or the hardware triggered strobe is similar to mode 4 or the square wave rate generator except that the retriggering is done by the external gate pin.

 

13. Which pin of 8253 is used for the generation of an external interrupt signal?

A. OUT pin
B. IN pin
C. Interrupt pin
D. Ready pin

Answer: A

The Intel 8253 timer has no interrupt pins. Therefore, the timer OUT pin is used to generate an external interrupt signal.

 

14. Which timer architecture can provide a higher resolution than Intel 8253?

A. Intel 8253
B. Intel 8254
C. 8051 timer
D. MC68230

Answer: D

The Intel 8253 and 8254 have the same pin configuration and functions. 8051 timer is programmable in the 8051 microcontrollers. The MC68230 timer developed by Motorola can provide a powerful timer architecture that can provide a higher resolution than the Intel 8253.

 

15. How many bit architecture does MC68230 have?

A. 16
B. 24
C. 32
D. 40

Answer: B

The MC68230 timer has a 24-bit architecture which is split into three 8-bit components because of the 8-bit bus in the MC68000 CPU.

 

16. How many bit buses does MC68230 have?

A. 2
B. 4
C. 8
D. 16

Answer: C

The MC68230 timer has a 24-bit architecture which is split into three 8-bit components because of the 8-bit bus which is used for communication with the host processor like the MC68000 CPU which have an 8-bit architecture.

 

17. Which of the following is a timer processor?

A. Intel 8253
B. MC146818
C. MC68332
D. Intel 8259

Answer: C

Intel 8253 and 8259 are timers or counters which support the processors. MC146818 is a real-time clock. MC68332 which is developed by Motorola is a 32-bit timer processor which can support MC68020.

 

18. What is the running frequency of MC68332?

A. 12 MHz
B. 14 MHz
C. 16 MHz
D. 18 MHz

Answer: C

The running frequency of the MC68332 is 16 MHz.

 

19. Which of the following is a real-time clock?

A. MC146818
B. 8253
C. 8259
D. 8254

Answer: A

The 8253, 8254, and 8259 are timers or counters developed by Intel whereas MC146818 is a real-time clock.

 

20. Which of the following is the pin efficient method of communicating between other devices?

A. serial port
B. parallel port
C. peripheral port
D. memory port

Answer: A

The serial ports are considered to be the pin efficient method of communication between other devices within an embedded system.

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