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Quickfilter Technologies




The QF3DFX-DK Development Kit is a complete solution for evaluation and system development using the QF3DFX, a powerful 3-channel system-on-a-chip designed for seamless insertion in an audio serial data path.  The kit allows the user to easily configure the QF3DFX to enhance the audio from an external amplified set of speakers.

Kit Contents:


  • QF3DFX Development Board
  • USB Cable
  • Quick-Start Guide

System Requirements:

  • Windows XP (SP2), Vista, or Windows 7.
  • Pentium 4 or better.
  • At least 17MB of hard disk space.


Circuit board features:


  • Expansion Connectors
    • J2 is used to program the FPGA. This is reserved for Quickfilter internal use only. Inappropriate use of this connector can result in the board becoming inoperable.
    • J7 is used to connect to an external TDM source and/or sink. It can be used to connect multiple QF3DFX-DK boards in order to implement and test 5.1 and 7.1 stereo system implementations.
    • J8 and J9 are used to interface the QF3DFX-DK to a QF3DFX on an external target board. J8 allows the pushbuttons on the QF3DFX-DK to signal the external part. J9 interfaces all other control signals necessary for the operation of the external QF3DFX. The use of these two connectors allows the QF3DFX-DK to fully control the external QF3DFX (assuming the external target board has been designed with this functionality in mind) while providing the full functionality of the QFPro software to build, test, and evaluate the performance on the target board.


  • Audio Connectors
    • The board provides for a single I2S or TDM input and 3 channels of I2S output. 
    • The input and output audio connectors can be set to different line levels 1Vpp or 2Vpp



  • External Power, Connector J3
    • The development board is usually powered via the USB connection on J1 and features on-board voltage regulators to provide a clean supply. However, if the board is to be run in stand-alone mode, then power must be provided via connector J3. Note: If power is supplied via connector J3, it must be +5V DC (+/- 5%).
    • Although it is unnecessary, power can be supplied from both J1 and J3 simultaneously. In this case, for correct operation, ensure that the USB cable is plugged into J1 and is powering the board prior to plugging in the power source to J3.

Booting into Stand-Alone Mode:

The QF3DFX-DK can self-boot into Stand-Alone mode using any of four stored configurations. By default, the QF3DFX-DK will boot into Stand-Alone mode using Configuration #1 when powered up with no USB cable connected.

Test Points:

A number of test points are provided for your convenience. Please refer to the schematics for their location and connection.

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