Elatec GmbH
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9.5 Mifare® Ultralight C
A Mifare® Ultralight C transponder consists of 48 pages with 4 bytes each. The UID is read-only and
is also mapped into the memory area. The 16 bytes Triple-DES key is stored in the last 4 pages of the
transponder.
Page
Byte 0
Byte 1
Byte 2
Byte 3
Access rights
00h
SN0
SN1
SN2
BCC0
Read only
01h
SN3
SN4
SN5
SN6
Read only
02h
BCC1
Internal
Lock0
Lock1
Read only / Lock
03h
OTP0
OTP1
OTP2
OTP3
One time programmable
04h
Data0
Data1
Data2
Data3
Read / Write
05h
Data4
Data5
Data6
Data7
Read / Write
…
…
…
…
…
Read / Write
27h
Data140
Data141
Data142
Data143
Read / Write
28h
Lock2
Lock3
RFU
RFU
Read / Write
29h
CNT
CNT
RFU
RFU
Read / Write
2Ah
AUTH0
RFU
RFU
RFU
Read / Write
2Bh
AUTH1
RFU
RFU
RFU
Read / Write
2Ch
Key1/K0
Key1/K1
Key1/K2
Key1/K3
Write only
2Dh
Key1/K4
Key1/K5
Key1/K6
Key1/K7
Write only
2Eh
Key2/K0
Key2/K1
Key2/K2
Key2/K3
Write only
2Fh
Key2/K4
Key2/K5
Key2/K6
Key2/K7
Write only