I finally have my code completed and working (with the 16F877 on the Lab X1 board) I'm in the process of moving over completely to a breadboard. My original configuration uses the Lab X1 development board which has the 16F877 installed from there it is hardwired to a breadboard that has additional circuitry and IC's.



All I want to do is move over the 16F877 onto the breadboard pre-programmed and wire it up.

My problem:
While hooking up the 16F877 connections, VSS, VDD & Crystal (4MHz) and caps (22pf) I don't measure any signal at all. I can measure the Lab X1 clock frequency at 4 MHz with an O-scope, nice amplitude and all. When I measure my breadboard 16F877/Crystal I measure nothing.

I have confirmed voltage, current limit, caps, etc. I have used a known good 16F877 from the Lab X1 board and installed onto the breadboard and still no signal. Am I supposed to wire up anything else? I'm using the PIC16F877 datasheet; section 12.2 as my source of Oscillator configurations. I also included a photo of my breadboard setup.

Any input would be greatly appreciated.
Netjammer-



PS. I've also tried other types of crystals freq's and packaging, no luck.