nRF52 stucks in ASM loop

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I'm trying to run SDK examples on BL652 module from Laird (which is basically nRF52832) by means of debugger from nRF52 Dev Kit

Strange thing is that all examples (even the simplest) are stucked in some strange place:

Does anybody have any idea why it happens?

Thanks

[Vidar Berg]

Hi,

The module is probably programmed with a bootloader (Memory layout). Try to erase the flash before you try the example.

[Nguyen Hoan Hoang]

The BL652 may not have the 32KHz crystal.  All Nordic examples require it.  The loop might be caused by waiting for the crystal which isn't there. I am guessing here.  You should check the datasheet to be sure. 

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Brilliant!

Now it works, thanks