Verify working of DCDC converter on PCA10056

[Remco Poelstra]

Hi,

I'm using the PCA10056 dev kit to verify the workings of the DCDC converter. I added the following code after nrf_sdh_enable_request():

e = sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);

When I now use an oscilloscope to check the DCC pin, I never see it switch. I tried connecting to the board using nRF Connect to have the Bluetooth radio active.

How can I verify that the DCDC converter is enabled?

Thanks in advance.

Kind regards,

Remco Poelstra

[Stian Røed Hafskjold]

Hi, in debug mode the PMU is not active, which means that the regulators are set to LDO mode (normal mode) and always powered on, even in idle or system off mode, and the clocks are always running. So this explains why you don't see the DCDC switching.

[Remco Poelstra]

Thanks! That explains a lot.