Forum › MIFARE SmartCard IC`s › Mifare Clasic 1K UID All 0 trouble › Reply To: Mifare Clasic 1K UID All 0 trouble
Hi Support Team,
Thanks for your input.
However it is not an issue of the reader device because
just some cards show the trouble.
Then let me ask the following same question again.
Please review the attached inlet case.
> After investigating the inlet,
>we found TESTIO pin is also connected with LA and VSS.
> Then we have two questions as follows.
> 1. Is it any issue when we connected TESTIO to antenna
> as the attached file?
> 2. If yes, is there any a cause-and-effect relationship,
> between UID all "0" or memory bit error and the connection?
Best regards,
N.O
Thanks for your input.
However it is not an issue of the reader device because
just some cards show the trouble.
Then let me ask the following same question again.
Please review the attached inlet case.
> After investigating the inlet,
>we found TESTIO pin is also connected with LA and VSS.
> Then we have two questions as follows.
> 1. Is it any issue when we connected TESTIO to antenna
> as the attached file?
> 2. If yes, is there any a cause-and-effect relationship,
> between UID all "0" or memory bit error and the connection?
Best regards,
N.O
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