I would like to use the PIC16F877 or 877A in place of a 74hc595 for shift outputs and 74hc597 for inputs. I am trying to build an interface to the GE Fanuc PLC 90-30 backplane for trouble shooting. I have a module that uses the shift registers to communicate or transmit and receive inputs and outputs. I have traced the circuit out and made a schematic on the unit. But my main question is can this be done, substitute the PIC for the shift registers. I have seen lots of posts for using the shift registers, but none to use the PIC as the shift registers. Also, I have seen a module that used a PIC for this interface before, I do not recall the part number of the PIC, other than it was a 40 pin Dip. I do not have to use the 16F877, it is just the one I currently have on had, I could purchase a different unit if there is on that would do this better. Any input would be greatly appreciated.
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