52833 pins issue

RE: 52833 pins issue

Kazi Afroza Sultana — Tue, 26 Sep 2023 11:14:24 GMT

Hello,

DCC pin is for DCDC mode. So, when there is LDO mode this pin will be floating. DEC1 is voltage regulatory decoupling pin which is always needed for both LDO and DCDC mode. B3 pin is always used for the filter for DCDC. You can see the pin assignments here https://infocenter.nordicsemi.com/topic/ps_nrf52833/pin.html?cp=5_1_0_6_0.

Thanks.

RE: 52833 pins issue

Francis Feng — Wed, 20 Sep 2023 07:41:05 GMT

Thanks Kazi!

RE: 52833 pins issue

Kazi Afroza Sultana — Mon, 18 Sep 2023 14:19:52 GMT

Hello,

[quote user=""]Does this B1 pin power the entire MCU?[/quote]

No. B1 pin is related to only powering the SoC. The nRF52833 has 5V boost regulator that gives a 5V stable output from few sources like USB connector J for the interface MCU, USB connector J3 for the nRF52833 SoC and few more you can find this from the following link.

https://infocenter.nordicsemi.com/topic/ug_nrf52833_dk/UG/dk/5V_power_sources.html?cp=5_1_4_7_2_0

These DEC1; DEC4; DEC3; DEC6; DEC5 chips act as supply voltage decoupler. It enables the DC/DC regulators through DCDCEN register. Using the DC/DC regulator will reduce current consumption compared to when using the LDO regulator, but the DC/DC regulator requires an external LC filter to be connected.

Thanks.

Kazi