Ok you EE level people (degree not required), I’ve been trying to understand an I/O board that uses TI’s octal D-type flip-flop with 3-state outputs. Best I can figure from my self-education is that these flip-flops are storing an input state. Perhaps until it’s state can be polled and cleared? Does that seem likely? Is this a replacement for, or a complement to, input interrupts? Do these provide any isolation for the MCU? I can see pros and cons of both flip-flops and interrupts, but are they used together?
I’m developing an I/O board myself, and always on the look out for a better idea, or an idea to store away for later. BTW, the board uses a PIC-something, sorry, don’t have the board in front of me, left it at the office.