Home Topics Quiz Login

8254 Interval Timer MCQ Questions & Answers

8254 Interval Timer MCQs : This section focuses on the "8254 Interval Timer". These Multiple Choice Questions (MCQs) should be practiced to improve the 8254 Interval Timer skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

If BCD=0, then the operation is

A. decimal count
B. hexadecimal count
C. binary count
D. octal count

View Answer

Question 2

In control word format, if RL1=1, RL0=1 then the operation performed is

A. read/load least significant byte only
B. read/load most significant byte only
C. read/load LSB first and then MSB
D. read/load MSB first and then LSB

View Answer

Question 3

In control word register, if SC1=0 and SC0=1, then the counter selected is

A. counter 0
B. counter 1
C. counter 2
D. none

View Answer

Question 4

In mode 2, if N is loaded as the count value, then after (N-1) cycles, the output becomes low for

A. 1 clockcycle
B. 2 clockcycles
C. 3 clockcycles
D. 4 clockcycles

View Answer

Question 5

The control word register contents are used for

A. initializing the operating modes
B. selection of counters
C. choosing binary/BCD counters
D. all of the mentioned

View Answer

Question 6

The counter starts counting only if

A. GATE signal is low
B. GATE signal is high
C. CLK signal is low
D. CLK signal is high

View Answer

Question 7

The generation of a square wave is possible in the mode

A. mode 1
B. mode 2
C. mode 3
D. mode 4

View Answer

Question 8

The mode that is used to interrupt the processor by setting a suitable terminal count is

A. mode 0
B. mode 1
C. mode 2
D. mode 3

View Answer

Question 9

The number of counters that are present in the programmable timer device 8254 is

A. 1
B. 2
C. 3
D. 4

View Answer

Question 10

The operation that can be performed on control word register is

A. read operation
B. write operation
C. read and write operations
D. none

View Answer