I've been working with this problem for two days now. Not only is my board with the MC9S12XD64 sensitive and require a VERY precise power up sequence but, after several uses the debugger thorugh the P&E USB Multilink cable stop working together or something.
What happens is that is loads the code to the MC9S12XD device but when in debugger and I try to step through my code it jumps over lines of code. If I view the assembly code i'm missing instructions and they're replaced with BGND.
What happened? i can't get it to work anymore.