Forum › MIFARE SmartCard IC`s › Mifare Clasic 1K UID All 0 trouble › Reply To: Mifare Clasic 1K UID All 0 trouble
Hi Naoki,
I got this answer to your question:
TESTIO and VSS should be floating, so using single slit assembly is not a problem. If they have used failing die from the wafer (picked up in error) then these will have no UID patched so will appear as 00 00 00 00.
The TapLinx Team
I got this answer to your question:
TESTIO and VSS should be floating, so using single slit assembly is not a problem. If they have used failing die from the wafer (picked up in error) then these will have no UID patched so will appear as 00 00 00 00.
The TapLinx Team
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