The Nordic Thingy:53™ supports the Near Field Communication (NFC) antenna. The NFC-A Listen Mode operation is supported by the nRF5340 System on Chip (SoC). The NFC antenna input is available on connector J5.
The following figure shows the NFC antenna connector on the Nordic Thingy:53.
Figure 1. NFC antenna connector
NFC uses pins P0.02 and P0.03 to connect to the antenna. The pins can be used as regular General-Purpose Input/Output (GPIO)s by changing their configurations. The PROTECT field in the NFCPINS register in UICR defines the usage of the pins and their protection level against abnormal voltages. The content of the NFCPINS register is reloaded at every reset.
Note: The NFC pins are enabled by default.