Good afternoon,

I have been working with a BGM111 and JLink Commander for a couple of years now successfully but now that I am moving to BGM220 I am facing some trouble that I can`t help to understand.

With an out of the box BGM111 I am able to connect to the microprocessor using device "EFR32BG1xxxxF256" and before running any programming command I check the MSC_STATUS (0x400E001C) register in order to ensure that the memory subsystem controller is not busy. Similarly, with an out of the box BGM220 I am able to connect to the microprocessor using device "EFR32BG22CxxxF352" but when it comes the time to read the MSC_REGISTER (0x4003001C) to ensure I can continue with programming commands I get a "Could not read memory" message. In that same session I am able to read flash or RAM memory without any trouble. But it is impossible to read that registers value.

What I have already tried and did not work:

• Use device "CORTEX-M33" instead of "EFR32BG22CxxxF352".
  
• Update to version 7.66f (I usually work with 6.82c)
  
• Use device "BGM220PC22WGA" (in version 7.66f) instead of "EFR32BG22CxxxF352".
  

Is there something I am doing wrong or missing?

I would really appreciate if you could help me.

Thanks in advanced.

Josu

For anyone interested on this issue I was able to solve the problem.

It looks like in this model the clock must be enabled in order to be able to read these registers.

To enable the clock write 1 in bit 17 of CMU_CLKEN1 register.