Timer

Embedded System

This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “Timer”.

1. Which of the following helps in the generation of waveforms?
a) timer
b) inputs
c) outputs
d) memory

2. Which bit size determines the slowest frequency?
a) counter size
b) pre-scalar value
c) counter
d) timer

3. Which bit size determines the maximum value of the counter-derived period?
a) counter size
b) pre-scalar value
c) bit size
d) byte size

4. Which of the following timer is suitable for IBM PC?
a) IA-32
b) Intel 8253
c) Intel 64
d) 8051 timer

5. Which of the following is mode 0 in 8253?
a) interrupt on start count
b) interrupt for wait statement
c) interrupt on terminal count
d) no interrupt

6. Which determines the mode 1 in the Intel 8253?
a) interrupt on terminal count
b) programmable one-shot
c) rate generator
d) square wave rate generator

7. Which mode of 8253 can provide pulse width modulation?
a) programmable one-shot
b) square wave rate generator
c) software triggered strobe
d) hardware triggered strobe

8. Which of the following is the mode 3 in the Intel timer 8253?
a) rate generator
b) hardware triggered strobe
c) square wave rate generator
d) software triggered strobe

9. Which of the following determines the rate generation?
a) divide by N
b) multiply by N
c) addition by N
d) subtraction by N

10. Which mode of the Intel 8253 timer can generate a square wave?
a) mode 1
b) mode 2
c) mode 3
d) mode 4

11. Which mode of the Intel timer 8253 provides a software watchdog timer?
a) rate generator
b) hardware triggered strobe
c) square wave rate generator
d) software triggered strobe

12. Which of the following mode is similar to the mode 4 of the 8253 timer?
a) mode 5
b) mode 6
c) mode 0
d) mode 1

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

14. Which timer architecture can provide a higher resolution than Intel 8253?
a) Intel 8253
b) Intel 8254
c) 8051 timer
d) MC68230

15. How many bit architecture does MC68230 have?
a) 16
b) 24
c) 32
d) 40

16. How many bit bus does MC68230 have?
a) 2
b) 4
c) 8
d) 16

17. Which of the following is a timer processor?
a) Intel 8253
b) MC146818
c) MC68332
d) Intel 8259

18. What is the running frequency of MC68332?
a) 12 MHz
b) 14 MHz
c) 16 MHz
d) 18 MHz

19. Which of the following is a real time clock?
a) MC146818
b) 8253
c) 8259
d) 8254

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