• State Not Answered
  • Locked Locked
  • Replies 19 replies
  • Subscribers 71 subscribers
  • Views 6732 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 112158
Options
This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Custom nRF52 board partially start

Fabien Comte

Hello, I just produced my custom board with nRF52 but i have a problem.

I can program it (SWD over nRF52 DK), debug it (segger debudder software) but in bootloader it enter in function ble_stack_init and never goes out.

Does someone have an idea what to check please ?

If external oscillator problem is a way to investigate, are they already on or nRF52 use an internal oscillator ?

Parents
  • 0

    As far as I can see the load capacitance for the 32KHz is a bit low. spec says 9 while you have 7.
    ((10+4)*(10+4))/((10+4)*2)=14/2 = 7pf

    The RC calibration should work just fine, that is it is stable at a given temperature, but needs to be calibrated if the temperature change. So I would recommend one of calibrate if the temperature has changed option.

Reply
  • 0

    As far as I can see the load capacitance for the 32KHz is a bit low. spec says 9 while you have 7.
    ((10+4)*(10+4))/((10+4)*2)=14/2 = 7pf

    The RC calibration should work just fine, that is it is stable at a given temperature, but needs to be calibrated if the temperature change. So I would recommend one of calibrate if the temperature has changed option.

Children
No Data
Related
Terms of service