Hi Ashish,

The point about the reset pin is interesting. I spoke yesterday to support at Cygnal and one question that came up was - had I looked at the reset line. So that was going to be the next task. The reset line presently is pulled up to 3.3v with a 1K resistor without any capacitor at present. For the other 2 micros on the board we use I think either 4.7 or 10K. Maybe the effective time constant of the lower 1K line is allowing some startup spikes through? I will try adding capacitance first as we have the board in production and I don't have room to add a supervisor IC. We should probably add that in the next revision, although we have not had any apparent problems with the other micros.

Thanks for your quick response

John Robbins