Hello,
Currently ı have a design which ı am using #MFRC522. Right now ı am updating this design for #CLRC663 plus. I have question about that:
Why there are two Tx pin İn both IC?
Why #MFRC522 has one Rx pin and#CLRC663 has two?
Thanks for your answer. what is the reason of two tx and one tvss pins for antenna?
Hello @muratt
This is determined by the internal structure of the IC. CLRC663 adds a mixer to optimize the RX performance, is backward compatible with MFRC522, and has various performance improvements.
And is there any specification about how can ı learn the reading distance?
Reading distance depends on the antenna design, so it's recommended that you can refer to AN11019
https://www.nxp.com/docs/en/application-note/AN11019.pdf
