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Disable UART of nRF52

Hi,

I am learning nRF development with 52DK device and SDK v16.0. I noticed that by default the 52DK planned P0.5~8 for UART purpose. 

I am wondering if I can disable UART usage and plan those PINs for other purposes (e.g. SPIM)?

  • What will be lost if I don't use UART? I mean debugging through JLink-OB shall still be working and RTT logging shall also work w/o UART.
  • What is needed to turn UART off from software aspect? Should I do extra things or simply don't include any UART related libraries or drivers in my app?

I understand that adjust of 52DK solder bridges is needed otherwise the i/f MCU might be still connecting to those PIN for UART purposes. Just want get a more complete understanding here from your experts.

Regards,

yf13