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TI Home » TI E2E Community » Support Forums » Low Power RF & Wireless Connectivity » RFID/NFC Forum » Accessing 80 bit memory of W9QL tag
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Accessing 80 bit memory of W9QL tag

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Colin Watson
Posted by Colin Watson
on Aug 10 2012 10:18 AM
Intellectual340 points

Hi,

I am using the RI-TRP-W9QL-30 tag as a selective animal access key to a feeder.   I read in the specs for this device that there are 80 bits memory in a single page but using SUTIL and the RI-K3A-001A-00  I can only see 64bits of memory which fully satisy my application.

However I would like to know how to access the invisible additional 16 bits normally used for the ISO CRC.   I am simple using the Microeader mode in SUTIL  and only work with the available 64 bits data payload.

How to I see the missing 16 bits beyond the 64bits seen ?

 

Very many thanks,

Docwat.

RFID
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  • KSA
    Posted by KSA
    on Aug 14 2012 04:17 AM
    Intellectual785 points

    Hi Colin,

    if you click Epert Mode under the View menu button, you will see TX String and RX String at the bottom of S2UTIL. This will show the whole send and response string including the CRC - unfortunately only for a very short time for the RX String. You should be able to see more replicating the strings with a terminal program, as the S2UTIL doesn't support 80 bit programming of R/W tags with the Microreader.

    Best regards,

    KSA

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  • Colin Watson
    Posted by Colin Watson
    on Aug 14 2012 04:35 AM
    Verified Answer
    Verified by Colin Watson
    Intellectual340 points

    Many thanks,

    Yes that answers my question.  If S2UTIL does not support 80 bit writing does it add the BCC to the 16 nibbles beyond the 64 bit ID chunk ?

    Also I added another post raising a problem with the LSB nibble - If I set this above 9Hex SUTIL comes back with a message saying locked - no programming possible but the write seems to take place and the tag programmed ?  Why is this     0000000000000009  OK   000000000000000A raises error.

     

    Many thanks

     

    Colin

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  • KSA
    Posted by KSA
    on Aug 14 2012 06:13 AM
    Intellectual785 points

    Colin,

    1.) Yes, S2Util automatically adds BCC to the 64 bits data when programming R/W transponders

    2.) Please ingnore the message, this seems to be a bug in S2UTIL

    Best regards,

    KSA

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