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Detailed information on 15693 Inventory timing on PN7462

Question asked by Matthew Rose on Dec 14, 2016
Latest reply on Jan 5, 2017 by Kan_Li

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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