TMEB8704 Atmel, TMEB8704 Datasheet - Page 23

• Manufacturer Part Number: TMEB8704
• Description: KIT DEMO FOR RFID TRANSPONDERS
• Manufacturer: Atmel
• Type: Development kitr

Specifications of TMEB8704

• Contents: Board, Cables, Manual and more
• For Use With/related Products: e5530, T5552, T5557, TK5530, TK5551, TK5552, U2270B
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.6.1
5.7
4781A–RFID–10/05
U9280M Microcontroller with Transponder Interface
Authentication
The RFID application kit can be used to demonstrate the encryption feature of the TK5561
read/write/crypto transponder. The PC software provides a user interface that enables the con-
figuration of the transponder. Furthermore, the RFID application kit acts as a base station so a
real challenge/response authentication procedure can be carried out. The AUT64 encryption
algorithm used in the transponder is fully emulated by the microcontroller of the RFID application
kit. The algorithm is carried out by hardware in the transponder and by the microcontroller. Both
results are displayed on the PC and authentication is verified. The user can change the input
parameters and key data of the encryption algorithm.
The transponder board is equipped with a standard U9280M-036 ROM mask version.
The U9280M-036 emulates the basic functions of the RFID transponder TK5561 combined with
keyless entry functionality.
When the transponder U9280M is selected, the Read tab is displayed. This sheet shows the
parameters of the Fixed Configuration (on the left side):
This configuration cannot be changed by a base station set up command. Parameters can be
changed by executing a special interface programming.
Use Read Timing on the right side to set the timing parameters for decoding. Under normal
operating conditions, the default values can be used.
To read out the transponder, use the Read button. The decoding principle, in simple terms, is to
send the Fixed Configuration and Read Timing to the microcontroller on the RFID application kit.
In a real-time analysis, the incoming data stream is decoded to binary values and then sent to
the PC. Clicking on the button Default restores the default setting. Clicking the Stop Transpon-
der-Modulation button sends the stop command to the transponder (this halts modulation until
POR). To leave the U9280M user interface, click on the Cancel button.
• Bit rate: Rf/32
• Coding: Manchester
• ID-code length: 128 bit
• Signature: Terminator 1
• AUT64 rounds: 24 times
TMEB8704 Application Note
23