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What is the time taken by one machine cycle if crystal frequency is 20MHz?

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in Microcontroller by (14.6k points)
What is the time taken by one machine cycle if crystal frequency is 20MHz?

(a) 1.085 micro seconds

(b) 0.60 micro seconds

(c) 0.75 micro seconds

(d) 1 micro seconds

I have been asked this question during an online exam.

My doubt is from Jump, Loop and Call Instructions topic in portion 8051 Microcontroller of Microcontroller

1 Answer

0 votes
by (24.2k points)
Right choice is (b) 0.60 micro seconds

To explain: Time taken by one machine cycle is calculated by the inverse of a (crystal frequency) /12

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