PN532 NFC Antenna detecting function

[minkoocho]

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

[weidong_sun]

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