"Anything you can do, I can do better". Said the PIC to the NE555.

I can see no reason to even attempt what you're proposing. The PIC can perform any function the 555 can do, without any external components. And do a bunch of other stuff at the same time.

It would be like using a 300hp car engine just to regulate how fast your electric can opener turns. Not that someone wouldn't try that either.
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