User's Manual

HF Mifare Easy Module V1.0
ACG Identification Technologies GmbH 13
5.2.2 Sector 0 / Block 0
Block 0 is read only.
Serial Number (4 byte)
Check byte (1 byte) Manufacturer data (11 byte)
Figure 5-3: MIFARE Standard: sector 0 / block 0
5.2.3 Block 3, 7, 11, 15, …
Transport keys are set on delivery:
Key A (6 byte) Access Conditions (4 bytes) Key B (6 byte)
Figure 5-4: MIFARE
®
Standard: block 3, 7, 11, 15, …
Key A
A0 A1 A2 A3 A4 A5 (Infineon) or FF FF FF FF FF FF (new Philips cards)
Key B
B0 B1 B2 B3 B4 B5 (Infineon) or FF FF FF FF FF FF (new Philips cards)
Access Conditions
FF 07 80 xx (key A used to read or write, the key A itself is not readable; key B is
data only). For further information refer to Frequently asked questions or Mifare card
manual.
Remarks
Enabled keys are always read as 00 00 00 00 00 00
Using key B as data area will cause a security gap, due to the fact that it is necessary
to rewrite key A and access conditions each write process. It is not recommended to
use it as data storage.
5.3 Mifare Ultralight
Mifare Ultralight cards have no encryption included. They only support plain text data
transmission.
Mifare Ultralight are only supporting 4 byte per sector, but the command set uses 16
byte per sector. Only the 4 least significant bytes are valid when using Mifare
Ultralight.
Ensure that the other bytes matching with tag content when using the write
command, otherwise the read back will fail.