NFC Field while Device is Off

Question

Hello, if an NFC field is applied to the nRF52832 (with NFC coil) while the device is off, is there a chance of damaging the chip?

Naeem Maroof · Accepted Answer

Hello Brian, 
 Apologies for the delayed communication. 
 I have received below response regarding this: 
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 The reset value of 0x20C (NFCPINS) is 0xFFFFFFFF, so NFCPINS.PROTECT = NFC, hence the best clamps for strong NFC fields are enabled. 
 In simulated case, when all supplies are zero with large magnetic field applied to the NFC pin, it is observed that the NFC protection cell still works by limiting the swing on the NFC pin. This was done for other SOCs, but the protection cell for nRF52 should be similar to those chips, and hence should work. 
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 We also suggest customer to do the testing and see how large fields could be tolerated as compared to their real use-case. 
 
 Regards, 
 Naeem

NFC Field while Device is Off

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