Hi, I am using a PIC18F2525 with MPLAB 8.30 and ICD3 and I am trying to debug c= ode = using Timer1. I use an ceramic resonator at 20MHz and have set OSC=3DHS. Timer1 is config= ured = to run in timer mode with FOSC/4 as clock. However, when I single step with = timer1 on, the timer seems to be free running even when the debugger is hal= ting = the PIC. This continuously fires the timer1 overflow interrupt and I get in= to = the ISR when stepping over/into next instructions. The timer works as expected when I try the code with the simulator. So, when the debugger (ICD3) is halting the processor - should timer1 conti= nue = counting? Actually, looking at Timer0 it has the same behavior - still counting when = the = processor is halted. Is it not possible to debug with ICD3 using a ceramic resonator as clock = source? /Ruben =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D Ruben J=F6nsson AB Liros Electronic Box 9124, 200 39 Malm=F6, Sweden TEL INT +46 40142078 FAX INT +46 40947388 ruben@pp.sbbs.se =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist