TMEB8704 Atmel, TMEB8704 Datasheet - Page 17

• 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

5.4.1
4781A–RFID–10/05
Answer-On-Request (AOR)
This feature is used to address an individual transponder when several transponders are in the
field. A transponder with activated AOR feature remains silent (no modulation) when an RF field
is applied. When the AOR wake-up sequence has been transmitted, the transponder starts
transmitting in ID mode and remains active until a POR occurs or a stop command is sent. A
transponder that has been activated by an AOR sequence operates like a transponder in stan-
dard read mode. The AOR feature is only useful in combination with the password mode.
Without a password, all transponders start modulation after each AOR wake-up sequence.
Warning:
Once the transponder has been configured to AOR mode, the user needs to know the correct
AOR wake-up sequence (password/Block 7) to read out the transponder's code. To change the
transponder's configuration (for example, to deactivate AOR mode), the password is also
required. During system design, use this feature with care.
To configure AOR mode, follow the steps below:
This way, each transponder can be set to AOR mode. When all transponders are configured, put
them into the RF field. To read out the transponders, follow the steps below.
1. Activate Password and Answer-On-Request in the Configuration Setup of the Read tab
2. Type in a unique password (hexadecimal code) into the Password text field
3. Change to the Write tab, select the Password check box in the Write Setup column and
4. Then click on Configure Transponder in the Read tab
5. The transponder is now in AOR and password mode
1. Type the password for a specific transponder into the Password text field
2. Click on the AOR wake-up button to activate the specific transponder
3. Read out the transponder by clicking Read
4. To stop the read function, click Stop Transponder-Modulation
5. Repeat steps 1 to 4 for the next transponder, using the appropriate password
click on the Program Transponder button
TMEB8704 Application Note
17