I'm using the 908AP32A. The WD or COP is enabled by setting the COPD bit in config1 to zero (power-on reset state). On a prior design using the HC05 processor this was a write once registor. On the 908AP32A this is not indicated as such, meaning if I have a power surge this bit could toggle to a logic "1" disabling the WD. This appears to be whats happening in a test stress condition. Is this true? I am not writting to this registor, I'm using the power-on state. Is this registor really a write-once (as it should be)? Should I write a zero to this registor? Or is there something that I'm missing?
Any help would be greatly appreciated.