User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 20
5.3 mifare
®
Ultralight
mifare
®
Ultralight cards have no encryption included. They only support plain text
data transmission.
mifare
®
Ultralight only supports 4 bytes per sector, but the command set uses 16
bytes per sector. Only the 4 least significant bytes are valid when using mifare
®
Ultralight.
Ensure that the other bytes match with the tag content when using the write
command; otherwise the read back will fail.
5.4 mifare
®
4k
mifare
®
4k cards have an increased memory. Beginning from sector 32 (20h), sectors
have 16 blocks. Due to compatibility reasons, the sector indices have changed
according to the following table. The login sector has to be used to access the
corresponding sector on the card.
Sector Block Login sector
00h 00h – 03h 00h
01h 04h – 07h 01h
… … …
1Fh 7Ch – 7Fh 1Fh
20h 80h – 8Fh 20h
21h 90h – 9Fh 24h
22h A0h – AFh 28h
23h B0h – BFh 2Ch
24h C0h – CFh 30h
25h D0h – DFh 34h
26h E0h – EFh 38h
27h F0h – FFh 3Ch
Figure 5-5: mifare
®
4k sector index table
5.5 mifare
®
ProX
mifare
®
ProX tags have an operating system onboard. Data organization depends on
the operating system installed on the card. These cards can include additional
functionalities such as DES or a proprietary encipher algorithm.
Before accessing the operating system, the card must be selected. Customized
commands are issued using the transfer command.