DEMO90121LR
RFID Long Range Demo User Manual
390129012104 Page 2 of 19 User Manual
Rev 003 Dec. 2009
Table of Contents
1 Scope...........................................................................................................................................1
2 Related Melexis product.............................................................................................................1
3 Introduction.................................................................................................................................2
4 Box Content ................................................................................................................................3
5 Connections ................................................................................................................................4
6 Function and use ........................................................................................................................4
7 Observations...............................................................................................................................4
8 Hardware .....................................................................................................................................5
8.1 General ..................................................................................................................................5
8.2 MLX90121 Power Booster ....................................................................................................5
8.3 Progressive Field increase...................................................................................................6
8.4 Serial interfaces ....................................................................................................................6
8.5 Power supplies and LEDs ....................................................................................................7
8.6 SPI and Serial memory .........................................................................................................8
8.7 External push button ............................................................................................................9
8.8 Microcontroller ATmega8.....................................................................................................9
8.9 RFID Antenna ......................................................................................................................10
9 Firmware....................................................................................................................................12
9.1 Structure..............................................................................................................................12
9.2 Practical information ..........................................................................................................13
9.3 Instruction set .....................................................................................................................13
10 Conclusion ..............................................................................................................................14
11 Annexes...................................................................................................................................15
11.1 Schematics........................................................................................................................15
11.2 List of components...........................................................................................................17
11.3 RFID Antenna Layout .......................................................................................................19
3 Introduction
You purchased a DEMO90121LR. Thank you for choosing Melexis RFID solutions. This document contains
the instructions to use and evaluate the functions and the performance of this demonstrator. All the
necessary hardware is provided in the packaging box and the microcontroller on-board is pre-programmed
with the firmware on the included CD. All that you need to do is connect the cables, start the
UT121
user
interface program, and then to send predefined ISO15693 commands to see the displayed answer from a
compatible transponder(s) placed in front of the long range antenna.
Should you want to start a development based on this demonstrator, you will find in this document and on the
CD all information, like schematics, board layout, list of components, firmware source (C code) and the
related application note. Please note that all this material is provided to support the use of the related Melexis
product. Duplication, circulation or storage on data carriers in any manner for any other type of use are not
authorized by Melexis unless under a specific agreement.
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