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I have been reading the mifare ultralight c datasheets, and I have a question perhaps someone here knows the answer to. The card is specified as a 7 byte UID, but looking at the datasheets there are actually 2 pages used for the UID, making 8 bytes. The card I have been working with specifically has a UID of 04 03 C5 CA 4D 61 81, but reading the pages in the authenticated dump shows a 4A after the first 3 bytes. What is the purpose/meaning of this?
------------------this byte
[=] 0/0x00 | 04 03 C5 4A | | ...J
[=] 1/0x01 | CA 4D 61 81 | | .Ma.
[=] 2/0x02 | 67 48 80 01 | | gH..
[=] 3/0x03 | 00 00 00 00 | 0 | ....
Nevermind, it's the BCC. I'm an idiot, I know.