NFCT CRC ERROR

[dmq]

My SDK revision is 16.0, but our NFCT driver is programed by ourselves,didn't ues Nordic LIB. HW is also made by ourselves.

It often generates CRC error durring normal communication with  some particular reader devices,but these devices are OK with other Tags，It is more likely to happen when it is put into NFC field quickly. what possible reasons would result in the CRC error ?  Does CRC error generated before or after the EasyDMA write from  NFC peripheral to RAM ? Is it about RX buffer in Data RAM be covered by other operation？

(We had CRC errors before, After disabled DCDC, the errors disappeared, Are these things related？)

Thanks！

dmq

[run_ar]

Hi,

What reader device are you having issues with?

As far as I understand the documentation, the receive packet is written to ram on the fly, including the CRC. Then you will either get EVENTS_RXFRAMEEND or the EVENTS_RXERROR as seen in the flow diagram:Operating states

[dmq]

The readers are used in subway station.I found the EVENTS_RXERROR in EVENTS_RXFRAMEEND IRQ handler.

Thanks

[dmq]

hi

 This NFC is unstable when DCDEN1 is enabled mentioned 

 errata FTPAN-98.

*(volatile uint32_t *) 0x4000568C = 0x00007029

where could I get this errata document？

Thanks！

[run_ar]

This is an old errata, and is on applicable to the first engineering revision -> [98] NFCT: Not able to communicate with the peer