Hello,
I'm trying to build a D flip-flop from gates using the "master-slave" design, but I can't figure out how to implement an asynchronous reset. Does anyone have any idea how this is done? I can't seem to find any circuit designs online, just a bunch of HDL code.
Thanks a ton for your help!
The asynchronous reset (preset) is simply another connection to the cross-coupled pairs to force them into the state you want independent of the state of the clock.
If you follow this you'll find a layout and some help on how to generate a schematic for it:
Basically a set/reset path is implemented with a gate in the path of the feedback to set a value regardless of the clock state.
Maybe try reading your textbook with a bit more depth...
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