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  • Case ID: 287785
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nrf21540 interface to 528xx

user114890

Hello Support,
I'm looking for reference schematic for the interface between nrf52840 (or similar) and the nrf21540 . Is there a simpler version than the developer kit user guide version in 21540 section? Have to trace it all out and can easily miss something.

Also is there some documentation and examples on how to write to nrf528xx USB port (not the usb/jlink on eval board) so I can configure the nrf21540 gain and some other parameters using the spi interface of the nrf52840?


I should be able to do write to nrf528xx USB port and send it out on the SPI port, right?

Thanks!

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  • 0 in reply to user114890

    Hello,

    You can look at this documentation about working with RF fron End Module https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_radio_fem.html#

    2.Are all the drivers for TX and RX signals etc. to 21540 interface are available in the examples and SDK?

    yes

    3. Can I use K-config in VS to configure 21540 including gain parameter?

    yes mostly the device tree is used for this.

    4. Is the configuration for the 21540 being written through the 52840 SPI?

    yes

    5.  Can I write the USB port of the 52840 chip to set the gain on 21540 (not using Jlink debugger) and how?

    According to our expat in team 

     It's technical feasible, but we don't have any samples that show-case this, and MPSL is also currently missing features for adjusting output power dynamically.

    Thanks.

    Best Regards,

    Kazi Afroza Sultana

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