I am using a PC9S12ZVML12MKH （maskset：0N06E）for a sensorless BLDC application.
When I downloaded the code into MCU and did single-step debugging，the initGDU program cannot work and all of GDU registers cannot be changed. But when the code is downloaded into development board ( S12ZVML-MINIBRD), the GDU registers can be changed. I cannot find some errors in my designed circuit board.
Have you encountered this situation?
Can you give me some advice about it?