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
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