Hardware configuration with no USB and no bluetooth

Hello,

I am writing this thread to ask what would be the hardware configuration for the QKAA version of the nRF5340 chip if I don't want to use the wireless features of the chip (both NFC and Bluetooth).

I found that the configuration no. 3 you propose in the datasheet is quite close to what I am looking for, but still the Bluetooth is considered to be used.

So my question is: 

"How the circuit configuration will change if I don't need Bluetooth and the power will be taken from the battery?"

Here I link an image where I mark what I am expecting to remove.

Would you please help me understand what the components are that I can remove without affecting the chip's performance?

Thanks for your time.

Regards,

Luigi Antuono 

Parents Reply
  • The nRF5340 has two CPU cores. The application core is supplied via DECD  and the network core is supplied via DECR. The radio is powered together with the network core. The main core is the application core so you will need this. 

    Now, the regulators have several modes. Then can operate in LDO mode and DCDC mode, where the latter requires the inductors to be in place. Since you're not using the radio, you can remove the inductor for the DECR DCDC (LDCC),  but the regulator will need the capacitor to operate properly. For the lowest current draw, it's recommended to keep the DECD inductor (LDCCD).

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