Hi there. I'm an undergrad in the mechanical engineering department at CSU, working on a class project. Amongst the things going into this are a keypad and an LCD. As I can't spare the pins to run either of them directly off the pic, I chose to use an EDE702 LCD controller and an EDE1144 keypad encoder.

However, both of these components require a 4Mhz external oscillator, which I forgot to purchase and now have neither the time to wait for them, nor the money to pay overnight shipping. Fortunately, I've heard that you can run an output off the PIC to serve as a direct TTL clock signal, but I have no idea how to do this and my own research into the matter has not been fruitful. If anyone can offer me any insight, it would be greatly appreciated.