I use HI-WAVE and USB BDM Multilink to debug my MM912H634,
Step1: I unsecure the MCU, passed.
Step2: I click HC12Multilink->Flash...
then warning as below,
"Error while loading diagnostics to target system.
The chip may be secured, or the derivative selected be wrong."
So I can't access to the flash to erase it.
Thanks a lot!