/nordic/nordic-blog/b/blog/posts/nfc-tag-antenna-tuningNFC principle A NFC system consists of two devices, an active and a passive device. The active device is powered, and induces a magnetic field with a coil inductor antenna. When the passive device is placed in this magnetic field, the varying magnetien-USTelligent Community 13https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nfc-tag-antenna-tuningMon, 30 Sep 2024 21:17:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c9279fbb-c10c-490f-be94-da5535f3c514peter94771<p>The two methods above for 52832 and 52840 appear to access undocumented registers.&nbsp; Is there similar information available for 52833, or would it match either of those two chips?</p> <div style="clear:both;"></div><img src="https://devzone.nordicsemi.com/aggbug?PostID=935&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nfc-tag-antenna-tuningWed, 03 Feb 2021 20:59:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c9279fbb-c10c-490f-be94-da5535f3c514ChinChin500<p>The two methods mentioned in this white paper, nWP-026, require having both poller and tag antennas be active. All we need is the impedance seen between NFC1 &amp; NFC2 ports to determine the matching network between NFC antenna and these two ports and this can happen without powering up any device. Can we have this impedance value published as one of the parameters in the data sheet?</p><img src="https://devzone.nordicsemi.com/aggbug?PostID=935&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">