Disable Power Save Options for PN5180

[weoiss]

Hello everyone,

I have a PN5180. I want to use it to track NFC tags. I am only interested in the UID of the tags. I have about 1.5 ms to read the UIDs from a distance of about 15 mm. Would an ISO15693 or an ISO14443 tag be more suitable?

I also discovered: https://community.nxp.com/t5/NFC-Knowledge-Base/How-to-configure-PN5180-LPCD/ta-p/1753793
Can I turn off the standby time and, if so, which setting do I need to adjust and how?
I would also like to use the maximum power, as I suspect that the tags can then be read more easily.
Which setting do I need to adjust for this?

Thank you in advance for your help!

Kind Regards!

[weoiss]

Hi @KaiLi ,

I got it to work for one tag. My problem is that the reader detects only one tag if they are close behind each other. 

I tried different poll Delays, sofTimeouts, inventoryBackoffs and frame timeouts, but it doesn't solve my problem.

Do you have any tips for me, what I can try additionally?

[KaiLi]

Hello @weoiss 

If the reading distance is approximately 15mm, ISO14443 is more suitable.

https://community.nxp.com/t5/NFC-Knowledge-Base/How-to-configure-PN5180-LPCD/ta-p/1753793, This post discusses the LPCD feature.
Yes, your understanding is correct. Using higher power will improve reading performance. In this case, you need an antenna design, not LPCD. We recommend referring to AN11740 AN11740

We recommend trying this design: ITVDD = 250mA, matching impedance = 20Ω

[weoiss]

HIi @KaiLi ,

thank you for your fast response! 

Since I have such a board, I assume that I only need to select and describe the correct registers. I am a student, so designing my own antenna would probably be too complex for me.

weoiss_0-1755782616898.png

So, do I have to disable LPCD or is it disabley by default? I try to control it via ESP32.

[KaiLi]

Hello @weoiss 

Yes, LPCD is disabled by default.