I am having a problem connecting to a PIC18F87J50. I constantly read a dev= ice ID of 0x0000. When looking at the PGC and PGD data during a connect, it se= ems like there is some capacitance between the signal lines and ground. Both the clock and data s= ignals slowly decrease in voltage magnitude throughout an attempted connection/pro= gram operation to the PIC. I added decoupling capacitors between power and grou= nd, which temporarily fixed the problem. However, I disconnected my breadboard circuit for the night. Now that I have resumed working, again I am reading= a device ID of 0x0000 with no luck. Previously, the PIC would not connect unless I temporarily probed the programming pins with an o-scope. It seemed like this temporarily discharged whatever capacitive voltage had built up??? I have ensured that all Vdd, Vcc, PGC, PGD, Vddcore, ENV, AVdd, and AVss pins are properly connected to either ground, supply voltage (3.3 V), or a = 10 uF capacitor for Vddcore. Any suggestions or anyone experienced a similar problem?? Thanks --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .