RE: How to configure the NCS sample to support nRF52840 QFAA QFN48

Håkon Alseth — Mon, 19 Feb 2024 13:02:24 GMT

Hi Tom,

[quote user=""]We found that the sample was configured for the nRF52840 QIAA by default after we selected the board of nrf52840dk_nrf52840 on the Add Build Configuration like the screenshot below.[/quote]

This does not have a great impact on the firmware complication itself. QIAA and QFAA has the same amount of peripherals etc, but the QFN48 package has less features routed due to the package being smaller/less pins are routed.

[quote user=""]but the default configuration has the CONFIG_BOARD_ENABLE_DCDC_HV=y and the CONFIG_SOC_DCDC_NRF52X_HV=y in the .conf file like the screenshot below. We were not sure this is the reason of the chip could not run normal.[/quote]

You should explicitly set CONFIG_BOARD_ENABLE_DCDC_HV=n when using this design.

Do you have an external 32k LFCLK? If not, you should also set this:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

Kind regards,

Håkon