PN532 NFC Antenna detecting function

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PN532 NFC Antenna detecting function

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minkoocho
Contributor II

Hello,

I split the circuit between antenna and antenna matching circuit.

I wonder if the chip has function to know whether it has an antenna(shorted) or not(open)

here is similar circuit but has the antenna shorted all the time.

https://learn.adafruit.com/adafruit-pn532-rfid-nfc/overview 

Thanks in advance

Minkoo Cho

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weidong_sun
NXP TechSupport
NXP TechSupport

Hello Minkoo ,

    There is no special pin for detecting antenna! but I think you can add the founction on you board by yourself, for example, select a GPIO of MCU as detecting pin, and software responses interrupt from antenna( plug in / out).

    Hope my advice can help you!

Best regards,

weidong

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