nrf52840 high voltage mode

[awang]

i tried to use the high voltage mode of nrf52840, but when i flash a firmware called "ble_app_hids_keyboard" which use the nrf52 sdk, all is good. but when i flash the firmware using the nrf connect sdk, the firmware didn`t run successflly in high voltage mode, but all gone well when in normal voltage mode.

so if there some settings when i wan`t to use high voltage mode with nrf connect sdk, or what resulted in the problem.

[dejans]

Hi,

Do you have a custom board or nRF52840DK?

If you use custom board with nRF52840 default value for CONFIG_BOARD_ENABLE_DCDC_HV is 'y' which means that you would use DCDC convertor in high voltage mode. This should be accordance with your hardware design where you would use 10 uH inductor between VDD and DCCH.

Best regards,
Dejan