Model 3421 USB Basic Display Protocol (BDP) Test Device

Model 3421 USB Basic Display Protocol (BDP) Test Device

Regular price $ 1,118.75 $ 0.00

SKU: 123003254

The MCCI® Model 3421 is a USB-to-HDMI converter device that operates with the Basic Display Protocol (BDP) based on the USB/VESA joint specification, available to VESA members at It can be used as a reference device for testing new host drivers that are implementing the BDP specification.

It features a USB 3.2 gen2 USB-C® port to receive video data from the host computer, a Micro HDMI port to drive an external display, and a USB micro-B port for control and diagnostics.

When operating as a BDP device on Windows® 10 and Windows 11, the Model 3421 device currently needs a custom BDP driver. The driver is supplied by Synaptics. MCCI will help customers with the process for obtaining drivers.


  • Operates using BDP version 1.2.
  • USB 3.2 gen2 (10 Gbps) connection to USB host.
  • A micro-B port provides remote control via integrated USB UART.
  • Power from the micro-B port takes precedence over power from the Type C port.
  • Field-upgradable firmware.
  • 1 gigabyte of onboard RAM.
  • 16-megabyte onboard flash.
  • Attractive, rugged plastic enclosure.

Custom firmware variants are available from MCCI.

Please contact for more details.

USB Type-C, USB-C, and USB4 are registered trademarks of the USB Implementers Forum. MCCI is a registered trademark of MCCI Corporation. Windows is a registered trademark of Microsoft Corporation. All other trademarks are the property of their respective owners.

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