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Hi Lars,
Yes, the first block contains the UID In the first bytes and manufacturer data. Block 0 cannot be written.
Each sector contains a sector trailer with the keys and access condition bits. For a blank card, these keys are FFFFFFFFFFFF and the condition allows to read and write. If you are the card issuer, which means personalize the card with content, you change the default keys. You may also change the access condition bits.
There are conditions possible where you can write with key A and B, but read only with key B or where you can read, but the writing is impossible. Be careful, if you write an access condition where a write is impossible, you will never re-write the sector again!
The byte 9 in the sector trailer is not used and you can write custom data to it.
Regards,
The TapLinx team
Yes, the first block contains the UID In the first bytes and manufacturer data. Block 0 cannot be written.
Each sector contains a sector trailer with the keys and access condition bits. For a blank card, these keys are FFFFFFFFFFFF and the condition allows to read and write. If you are the card issuer, which means personalize the card with content, you change the default keys. You may also change the access condition bits.
There are conditions possible where you can write with key A and B, but read only with key B or where you can read, but the writing is impossible. Be careful, if you write an access condition where a write is impossible, you will never re-write the sector again!
The byte 9 in the sector trailer is not used and you can write custom data to it.
Regards,
The TapLinx team
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