https://devzone.nordicsemi.com/f/nordic-q-a/80583/nfc-t4t-time-between-operationHi, We are using NFC T4T library to communicate with USB readers, everything work correctly until we changed some internal processing which increase operation time (approx 4.5 times, some operation changed from 180ms to 900 ms). We try to change NFC_T4T_PARAM_FWIen-USTelligent Community 13Fri, 15 Oct 2021 10:28:31 GMThttps://devzone.nordicsemi.com/thread/334307?ContentTypeID=1Fri, 15 Oct 2021 10:28:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81e7b2e0-040b-4982-813a-8fd7c7e3fde2Juraj Kostal<p>Hi,<br /><br />It looks like it helps, we must test it properly, but for now it looks that it works<br /><br />Thank you</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/333949?ContentTypeID=1Wed, 13 Oct 2021 12:56:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d81c58af-52ab-4339-bd2a-1404c9070581Kenneth<p>Think you will have to try to step back to see what code may be executing and thereby pending the NFC from acting. Does changing&nbsp;NRFX_NFCT_CONFIG_IRQ_PRIORITY have any effect?</p> <p>Kenneth</p><div style="clear:both;"></div>