iqInterface FTDI chip configuration manual

Owned by Former user (Deleted)
Last updated: Aug 25, 2020 by Dmytro Svitlychnyi

IMPORTANT!!!

The FTDI chip is preconfigured by manufacture and next changes are not recommended for user. Changing FTDI setting manually can lead device to malfunctioning


FTDI chip is used in iqInterface Product as USB PHY transceiver.

During the production phase, FTDI chip should be configured with correct parameters to provide correct functionality and maximum performance.

As long as iqInterface is a self-powered gadget, it can use as much current as it needs during normal operation and USB suspend as it has its own power supply.

The following FTDI chip options should be configured:

  • The power descriptor in the internal MTP memory of the FT230X should be programmed to a value of zero (self-powered).

  • CBUS3 pin should be configured as VBUS_Sense# in the internal MTP memory and used not to force current down the USB bus when the USB host or hub controller is powered down.

The following values should be assigned:

  • CBUS C3 pin = VBUS_Sense#.
  • Power Option = self-powered.

"FT_Prog" Software tool used to accomplish this task. Use the following guide for configuration:

  1.  Download and install latest "FT_Prog" software from the link provided:

    http://www.ftdichip.com/Support/Utilities.htm#FT_PROG

    (direct link http://www.ftdichip.com/Support/Utilities/FT_Prog_v3.1.72.360%20Installer.exe)


  2. Connect iqInterface gadget with USB cable and make sure it's recognized by OS as Virtual COM Port connection.



  3.  Start "FT_Prog" software.
  4. After the main window appeared click "Scan" Button:



  5. Go to "Device ->USB Config Descriptor" node in the Device-Tree Navigator and set "Self-powered" option to true (set "Max Bus Power" parameter to 0mA, optional).




  6. Go to "Device->Hardware Specific->CBUS Signals" node in the Device-Tree Navigator and set "C3: property to the "VBUS_Sense" option:



  7. Click “Program Devices” button in the main ToolBar or choose menu "Devices" → "Program".



  8. In opened window "Program Devices" make sure connected device checked in Device List and click "Programm" button to program the memory:



  9.  Configuration complete.