Hello Ricardo, Thursday, Thursday, January 20, 2000, you wrote: RFC> Hello, RFC> With respect to the PIC16C84 pin 3, could you say what the abbreviation RFC> T0CKI stands for and exactly how it should be used? I know this is an input RFC> /output pin for Port A, however I am unfamiliar with this pin's use as RFC> T0CKI. RFC> Thanks and Regards, RFC> Ricardo I suggest, that you download some documentation fromthe microschip site, or (I've heard that the local vendors have copies of it), get a offline copy of it on a CD. In the PDFs, such things are explained very well.