NFCのトピックRe: CLRC663 use Analog TX and RX

CLRC663 use Analog TX and RX

michaelliesenbe — Tue, 11 Aug 2020 14:39:18 GMT

Hi,

i want to use 2x CLRC663 to make my own wireless data transfer.

I understand that SIGOUT can output RX_active signal and SIGIN can be used for external signal:

I program the CLEV6630ARD evaluation board registers with my external MCU over SPI and i could measure the NFC Modulation on the TX Pins. I have a Pulse generator connected to SIGIN and at SIGOUT i am watching the RX_active signal.

I am expecting to have the same pulse signal on SIGOUT that i have on SIGIN, but that is not the case.

Am i missing something or RX_active is not the real analog output from the DEMODULATOR?

Best regards,

Michael

Re: CLRC663 use Analog TX and RX

stephanie_m — Thu, 13 Aug 2020 22:53:27 GMT

Hello,

How did you configured the following registers?

Are you checking the output provided by the SigOutSel ?

Regards ,

Estephania

Re: CLRC663 use Analog TX and RX

michaelliesenbe — Tue, 25 Aug 2020 06:49:13 GMT

Hi Estephania,

here is how i wrote the registers:

1- Is it possible to use only the analog side of CLRC663? Using the Analog TX and Analog RX with my own coding on external MCU?

Best regards,

Michael

Re: CLRC663 use Analog TX and RX

stephanie_m — Wed, 26 Aug 2020 01:26:15 GMT

Hello,

Do you mean something like this application note?

https://www.nxp.com/docs/en/application-note/AN12657.pdf

You can try to implement it like what it is mentioned in that application note.

Hope it helps.

Regards,
Estephania

Re: CLRC663 use Analog TX and RX

michaelliesenbe — Wed, 26 Aug 2020 12:56:48 GMT

Hi Estephania,

the application only shows how to write the registers and that is what i already have done.

i want to use the Analog Front End from the CLRC663 and bypass the digital part using the internal multiplexer, is this possible?

Because the active RX output is not what i expected.

Here is a diagram showing the way i would like to use the CLRC663:

Best regards,

Michael

Re: CLRC663 use Analog TX and RX

stephanie_m — Wed, 26 Aug 2020 22:38:03 GMT

Hello,

Sorry, the implementation you want to achieve it's not supported.

Sorry for the inconveniences this might cause you .

Regards,

Estephania