Help¶

According to the UART specification high frequency RC oscillator is
not accurate enough. However, in normal conditions and accurate clock
on the transmitter side it may be accepted to disable it. Turning on
HFXO prolongs receiver activation for up to 3 milliseconds.

Direct dependencies¶

NRF_SW_LPUART

(Includes any dependencies from ifs and menus.)

Default¶

y

Kconfig definition¶

At <nRF>/drivers/serial/Kconfig:26

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:23 → <Zephyr>/modules/Kconfig:6 → <BuildDir>/kconfig/Kconfig.modules:2 → <nRF>/Kconfig.nrf:53 → <nRF>/drivers/Kconfig:15

Menu path: (Top) → Modules → nrf (/home/runner/work/sdk-nrf/sdk-nrf/ncs/nrf) → Nordic nRF Connect → Device Drivers → Low Power UART using REQ/RDY lines

config NRF_SW_LPUART_HFXO_ON_RX
    bool "Turn on HFXO for RX"
    default y
    depends on NRF_SW_LPUART
    help
      According to the UART specification high frequency RC oscillator is
      not accurate enough. However, in normal conditions and accurate clock
      on the transmitter side it may be accepted to disable it. Turning on
      HFXO prolongs receiver activation for up to 3 milliseconds.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)