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Detailed information on 15693 Inventory timing on PN7462

Question asked by Matthew Rose on Dec 14, 2016
Latest reply on Nov 9, 2018 by Marcin Baliniak

We are working right now to measure latency and trying to improve the value on the PN7462. We are using ‘NfcrdlibEx1_BasicDiscoveryLoop’ example to do so. We are able to read the UUID of multiple ICODE SLIX tags by applying changes suggested by NXP. We tried  ‘NfcrdlibEx1_BasicDiscoveryLoop’ example. Unfortunately the UUID reading delay seems to be very high. We have a requirement to finish reading of at least four tag’s UUID and Data within 300msec. The delay seems to be nearly 1 second with the above example code. Are there any variables or strategies to apply in order to achieve the goal of reading four tags within 300 mS? Using an o-scope we measure the following:

 

Inventory delay of 4  ICODE SLIX tags  :     360ms

Inventory delay of 4 TI’s ITAG   :                 340ms

Inventory delay of 4 TI’s ITAG tag with same last UUID byte   :     554ms

 

Thank you very much for your time.

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