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Provide to-the-point (max 4 to 5 lines) answer to the following: What is the main...

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bc090401213 | Student, Undergraduate | eNoter

Posted January 5, 2011 at 3:31 PM via web

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Provide to-the-point (max 4 to 5 lines) answer to the following:

  • What is the main difference between a gated S-R latch and an edge-triggered S-R flip-flop?
  • How many flip-flops are required to produce a divide-by-32 device?

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nessus | High School Teacher | (Level 2) Adjunct Educator

Posted July 10, 2011 at 5:28 PM (Answer #1)

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A gated set-reset latch would be controlled by e.g. (a) 2 input AND, (b) 2 input OR, (c) NOT gates. It has to have a logic input to operate the gate.

An edge-triggered S-R is controlled by either the rising or falling voltage from some input device.

5 flip-flops are used in the CD4017 to implement divide-by-32.

32 is 2^5.

 

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