Asynchronous inputs in the flip-flop sequential circuit: study notes
Figure 5-33(a) shows the symbol for a J-K FF that responds to a NGT on its clock input and has active-LOW asynchronous inputs. The external active- LOW asynchronous inputs are labeled PRE
Edge Triggered D Flip-Flop with Asynchronous Set and Reset Tutorial
Asynchronous inputs
Asynchronous Input - an overview | ScienceDirect Topics