NINA-B4 series - System integration manual
UBX-19052230 - R06 Design-in Page 22 of 45
C1-Public
Figure 7: Extended host ground plane outside NINA-B4x6
Figure 8: NINA-B4x6 keep out area
2.4 NFC interface
⚠ As the pins for the NFC interface in NINA-B40 series modules can be used as normal GPIOs, it is
important that all NFC pins are correctly configured in the software. Connecting an NFC antenna
to pins that are configured for GPIO can damage the module. In NINA-B41 series modules, NFC
pins are always set to "NFC mode".
The NFC antenna coil must be connected differentially between the NFC1 and NFC2 pins of the
device.
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