> I need some help. I wnt to connect a keypad (4x3) and a LCD (16x2) > to a 16F84.Also i need to implement a serial interface an a on that > chip ... is that possible, or i need a "bigger" chip? Thanks for the > help!!! Yes it is possible. Serial interfaces are not that hard on a PIC of any size. You are tackling a pretty complex project, though. Unless you've worked with other microcontrollers before, I would not make that your first project. Try something simple, build up to running LCD's and keypad matrices slowly. Have a few successes. -- Lawrence Lile "The ideal design has zero parts" - (attributed to Harold Hallikainen) Download AutoCad blocks for electrical drafting at: http://home1.gte.net/llile/index.htm