Has anyone measured how long it takes for a PIC to execute the first instruction after a wake up from sleep by external interrupt? The Microchip manuals quote 1024 instructions, but Im guessing there would be additional delay as the chip waits for the crystal to start oscilating. The code that is executed after the wake up is time critical, and I need to compensate for delay. Im running a 16F84, 4.194Mhz crystal, and interrupt from RB0. Any ideas would be apreciated. Dean -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements