Timers & Counters of 8051 - MCQs with Answers

Timers & Counters of 8051 - MCQs with Answers


Q1. What is the counting rate of a machine cycle in correlation to the oscillator frequency for timers?

a. 1 / 10
b. 1 / 12
c. 1 / 15
d. 1 / 20

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ANSWER: b. 1 / 12



Q2. Which special function register play a vital role in the timer/counter mode selection process by allocating the bits in it?

a. TMOD
b. TCON
c. SCON
d. PCON

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ANSWER: a. TMOD



Q3. How many machine cycle/s is / are executed by the counters in 8051 in order to detect '1' to '0' transition at the external pin?

a. One
b. Two
c. Four
d. Eight

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ANSWER: b. Two


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