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I can unsecure the MCU(S12 and secured) with usb multilink, but I can't erase flash data?

Question asked by David Dai on Jun 12, 2015
Latest reply on Jun 18, 2015 by David Dai



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.

Any reason?


Thanks a lot!


Best Regards


David dai