This anomaly applies to IC Rev. Engineering A, build codes QFAA-AA0, QFAA-AC0.
The NFC poller is missing some frames from the NFCT device.
Always
The NFC poller might miss some frames from the NFCT device.
Apply the following register setting during the device startup just after reset. *(volatile uint32_t *)0x40005610 = 0x00000005; *(volatile uint32_t *)0x40005688 = 0x00000001; *(volatile uint32_t *)0x40005618 = 0x00000000; *(volatile uint32_t *)0x40005614 = 0x0000003F; This code is already present in the latest system_nrf52.c file.