> Gently breathing on it also will show the thermal effect, which is > quite impressive. I had this girlfriend once ....... If you can change the behaviour of the chip like that (and the WDT initiation timing) it must indicate a physical problem - ie the silicon or the bonding perhaps. I've had a project where the order of setting various module configurations in the power-up section, all prefectly legitimate ways according to the datasheet, could stop the ADC working properly And you might have missed a post of mine a couple of months back. How the SPI module (very suspect construction IMVHO) on a dsPIC was used affected even the RETURN instruction Which is just nutty. Silicon nutty. I went through both problems with Microchip - just as you have with Atmel - they could offer no explanations or solutions, so I had to find my own Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .