• State Verified Answer
  • Replies 11 replies
  • Subscribers 71 subscribers
  • Views 4289 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 111538
Options
This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts

NRF51822 mKit P0.26 problems

simonk

Hello,

We have this board (www.nordicsemi.com/.../nRF51822-mKIT) and would like to use P0.26 and P0.27 as GPIO (or RX/TX for serial). I've cut both solderbridges (SB2 & SB3) and soldered SB4 & SB5 to connect to header pins.

While there is no problems with P0.27, P0.26 is very problematic. If I just touch P0.26 with my fingertip, processor clock obviously doesn't work anymore. The same happens if I connect 2-3cm long wire...

Many thanks for any suggestions how to fix this. We have made a custom board with the same pinout, but we need to fix this somehow.

Parents
  • 0

    I have found Clock source settings in nrf51_bitfields.h

    CLOCK_LFCLKSRC_SRC_RC /*!< Internal 32KiHz RC oscillator. / CLOCK_LFCLKSRC_SRC_Xtal /!< External 32KiHz crystal. / CLOCK_LFCLKSRC_SRC_Synth /!< Internal 32KiHz synthesizer from HFCLK system clock. */

    If I select RC or Synth in SOFTDEVICE_HANDLER_INIT, those options are not ok... Since I wan't GPIO on that pin, external Xtal option is not possible. Any other suggestions? Or am I doing something wrong?

Reply
  • 0

    I have found Clock source settings in nrf51_bitfields.h

    CLOCK_LFCLKSRC_SRC_RC /*!< Internal 32KiHz RC oscillator. / CLOCK_LFCLKSRC_SRC_Xtal /!< External 32KiHz crystal. / CLOCK_LFCLKSRC_SRC_Synth /!< Internal 32KiHz synthesizer from HFCLK system clock. */

    If I select RC or Synth in SOFTDEVICE_HANDLER_INIT, those options are not ok... Since I wan't GPIO on that pin, external Xtal option is not possible. Any other suggestions? Or am I doing something wrong?

Children
No Data
Related
Terms of service