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Pins marked as n.c. in datasheet nRF5340-QKAA. What to do with them on the PCB?

henning larsen

The datasheet list 

A25, B12, B26, D2, F2, G1, H2, J31, K2, T2, AG31, as N.C.

I have not been able to read exactly what N.C. implies: It could be: "do not connect", "no internal connection".

If one for clarification looks at the example circuits in the dataheet some of these pin, but not all are connected to Vss (gnd)

The connected pins are:

A25, B12, B26,              G1, H2, J31 

So it means that D2, F2, K2, T2, AG31 are left unconnected. A bit unclear which rule to follow.

Bottom line of my question: what is the required connection for pins marked N.C.

Thanks

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  • +1

    Hi,

    The N.C means Not Connected. These pins are dummy pins for mechanical stability and not internally connected to the die of the SoC. Some of them are connected to VSS because of the layout and this helps in grounding and also, as I mentioned earlier, the mechanical stability. So you don't need to connect them. It's okay to leave them "not connected".

    Best Regards,

    Priyanka

Reply
  • +1

    Hi,

    The N.C means Not Connected. These pins are dummy pins for mechanical stability and not internally connected to the die of the SoC. Some of them are connected to VSS because of the layout and this helps in grounding and also, as I mentioned earlier, the mechanical stability. So you don't need to connect them. It's okay to leave them "not connected".

    Best Regards,

    Priyanka

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