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Melexis DVK90121 User Manual

Development kit for the mlx90121 transceiver
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Features and Benefits
Standard ISO communications
User interface software
RS232 serial communication
Dedicated instruction set
6 to 9Volts supply compliant
Ordering Information
Part No.
DVK90121
General Description
The development kit DVK90121 has been developed by Melexis to create specific applications using
international standards ISO/IEC and to evaluate the advantages and the high flexibility of the MLX90121
13.56MHz multi-norms RFID transceiver.
The DVK90121 consists of the evaluation board EVB90121 connected to the RFID universal development
board. The universal development board contains the firmware for the communication with the MLX90121
and the communication with a computer through the RS232 serial interface.
A user interface software UT121, developed by Melexis, allows the user controlling the communication by
initializing the MLX90121 device, sending specific commands and receiving the corresponding reply.
Universal Development board
Pre-programmed firmware used as an interface
between the PC and the EVB90121
390129012102
Rev 006
Development kit for the MLX90121 transceiver
UT121
User interface
Figure 1: DVK90121 block schematic
Page 1 of 13
MLX90121
Evaluation board of the Mlx90121
Digital interface
13.56MHz RFID transceiver
DVK90121
User Manual
Transponder
EVB90121
Development Kit
Apr-2009

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Summary of Contents for Melexis DVK90121

  • Page 1 Part No. DVK90121 General Description The development kit DVK90121 has been developed by Melexis to create specific applications using international standards ISO/IEC and to evaluate the advantages and the high flexibility of the MLX90121 13.56MHz multi-norms RFID transceiver. The DVK90121 consists of the evaluation board EVB90121 connected to the RFID universal development board.

  • Page 2: Table Of Contents

    DVK90121 Development kit for the MLX90121 transceiver User Manual Table of Contents UNPACKING THE SYSTEM ................................3 2. CONNECTING THE SYSTEM ................................3 3. INSTALLING THE UT121 USER INTERFACE SOFTWARE........................ 4 4. WORKING WITH THE UT121 USER INTERFACE SOFTWARE ......................4 ............................4...

  • Page 3: Unpacking The System

    Disk set consisting of the UT121 software and associated documentations. 2. Connecting the system When you start with the development kit DVK90121, please follow the procedure described below. 1) Connect the PCB antenna to the evaluation board EVB90121 using the SMA connector.

  • Page 4: Installing The Ut121 User Interface Software

    Figure 3: First use message The update check interval will be used to automatically check on the Melexis WEB-site if new updates are available. The software will ask to the user if he allows the download and the automatic replacement of the user interface software and firmware.

  • Page 5: Main Window

    4.3 Communication status The UT121 user interface software can communicates the RS232 or USB serial interfaces. The communication status part displays the status of the selected port. (Use of the DVK90121 is only possible through RS232 port) A double-click on the communication status opens the “select port window” which allows the user selecting the appropriate port and Baud rate.

  • Page 6: Device Status

    Next time the program is executed these settings will be automatically uploaded. 4.4 Device status The device status shows if a Melexis development kit is connected to the user UT121. Then the name of the development kit is displayed as shown on the following picture.

  • Page 7: Command Tree

    All commands of the UT121 software are separated in two parts. The Comment part, which is a name chosen by the user and the Command part, which is the real command send to the DVK90121. This command cannot be completely defined by the user and should have a fixed definition part to be understood by the firmware.

  • Page 8: Ommand List Egisters Configuration

    When a group or sub-group is selected, the UT121 software automatically sends the current configuration to the DVK90121 to update the registers of the MLX90121 transceiver. To access this registers configuration, press onto the ‘ ’ and a window with all register’s name and hexadecimal values will be displayed.

  • Page 9: Communication Screen

    The right side of the main window shows the communication between the computer and the development kit. Each time the user sends a command, it appears in the screen, followed by the reply of the DVK90121. The user can specify the number of displayed lines in the “Lines to show” window. It was set up to make sure the most recent command or reply are displayed without scrolling.

  • Page 10: Set Of Commands

    The firmware controls the communication with the MLX90121 multi-protocol RFID reader. Therefore, it has to be informed by the UT121 software of the protocol used and the command that needs to be executed. This chapter describes in detail the set of instructions used for the communication to the DVK90121 (microcontroller firmware).

  • Page 11: Examples

    5.5 Examples Some examples of commands are described in this chapter. 5.4.1 ISO14443 type B The DVK90121 allows the communication until the level 3 of the ISO14443 protocol called “Initialization and anticollision”. o WUPB (Wake-up type B TAG) Op code...
  • Page 12 DVK90121 Development kit for the MLX90121 transceiver User Manual O WRITE SINGLE BLOCK (WSB, CSB) Op code Parameters Key words Iso15 42210011223344 Slot 2 ‘42’ : Flags of the request The 16bits CRC is Two slots send after ‘21’ : Write single block command automatically the request.

  • Page 13: Disclaimer

    2) Any use of the documentation without the prior written consent of Melexis other than the one set forth in clause 1 is an unfair and deceptive business practice. Melexis is not responsible or liable for such altered documentation.

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