How to write single wire protocol for NFC (ST25TA02K-PC6H5)

[sangar]

Hello all,
My project have NFC from STMicroelectronics. Below is the interface between Microcontroller and NFC




As shown in figure, NFC uses its GPO pin to interface with MCU. With that, How can I read/write NFC registers?. Is GPIO support to write single wire protocol?

Please suggest

Regards,
Sangar

[ataradov]

You can't read or write over that pin. GPO is just an output that indicates when RF power is present (or different things). The rest of the configuration is done over RF.

Section "General Purpose Output (GPO)" of the datasheet is pretty clear about that.