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Digital ElectronicsFlip-Flops

In an asynchronous clear input of a flip-flop, the term asynchronous means that clearing can occur?

  • AWithout waiting for an active clock edge
  • BOnly at the next clock edge
  • COnly when data input is HIGH
  • DOnly after two clock cycles
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Correct Answer: A. Without waiting for an active clock edge
Explanation: An asynchronous clear directly forces the stored state to the reset value independent of the normal clock transition.
Reference: Standard digital electronics: asynchronous reset
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