https://community.nxp.com/t5/Wireless-MCU/MFRC522-not-switchable-to-UART/m-p/1586305#M14410 <P>I am trying to use the UART interface instead of the SPI with MFRC522.</P><P>I set the EA pin and i2c to GND, but the communication is still working in SPI, I am not able to use UART.</P><P>Pin are measured with multimeter and value are ok.</P><P>Tried a reset with dedicated pin but still working is SPI&nbsp; and not UART.</P><P>Is there any suggestion?</P><P>Thank you for support</P> Fri, 20 Jan 2023 22:55:00 GMT PaoloArtuso 2023-01-20T22:55:00Z https://community.nxp.com/t5/Wireless-MCU/MFRC522-not-switchable-to-UART/m-p/1586305#M14410 <P>I am trying to use the UART interface instead of the SPI with MFRC522.</P><P>I set the EA pin and i2c to GND, but the communication is still working in SPI, I am not able to use UART.</P><P>Pin are measured with multimeter and value are ok.</P><P>Tried a reset with dedicated pin but still working is SPI&nbsp; and not UART.</P><P>Is there any suggestion?</P><P>Thank you for support</P> Fri, 20 Jan 2023 22:55:00 GMT https://community.nxp.com/t5/Wireless-MCU/MFRC522-not-switchable-to-UART/m-p/1586305#M14410 PaoloArtuso 2023-01-20T22:55:00Z