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S12XET256 doesn't reset always with COP enabled

Question asked by Emanuele Castagnini on Jul 6, 2015
Latest reply on Jul 9, 2015 by Radek Sestak

Hi all, I've a board in which I use S12XET256 controller, initialized only once with COPCTL=0x41 (or 0x01). I have a very noisy environment with inductive loads (motor power contactors) that switch on and off at any motor run. I mostly see a reset from COP properly working especially when inductive load is switched off, even if I have RC filter and varistor on the contactor's coil, but sometimes board remains locked, with oscillator ON and reset at 5V. Has anyone some suggestion for this problem? Many thanks, Emanuele.