Vinculum-II (VNC2) - Programmable USB 2.0 Host/Slave Controller IC

Fully programmable USB 2.0 host/slave controller offering a complete USB system solution in a single IC.

Vinculum-II (VNC2) is FTDI's 2nd generation of USB Host / Slave controllers.  The device features a powerful 16-bit MCU core, with embedded 256KB Flash and 16KB RAM memory.  The device supports a range of flexible interfaces including UART, SPI, FIFO and PWM.  The complete USB protocol data processing is handled entirely by hardware resources within the device freeing up processing resources for user developed applications.

The VNC2 is a fully programmable device and is supported with the new Vinculum Software Tool Suite, which provides an easy to use 'C' based development environment to enable user firmware development. Or alternatively, the designer can configure VNC2 with one of the many precompiled ROM files developed by FTDI to cover a range of popular interfaces. These are described at Precompiled Firmware . The VNC2 offers a complete USB system solution in a single IC.

Key features:

  • Dual USB 2.0 Host / Slave controller.
  • Embedded 16-bit Harvard architecture MCU core, with 256KBytes of Flash memory and 16Kbytes RAM.
  • 2 x Full-Speed / Low-speed USB 2.0 ports supporting Host or Slave operation.
  • Programmable UART interface, supports up to 6MBaud transfers.
  • 8-bit wide FIFO interface.
  • 2 x SPI slave interfaces, 1 x SPI master interface.
  • PWM (Pulse Width Modulation) interface.
  • 4 channel DMA controller, and general purpose timers.
  • Support for reduced power modes.
  • Backwards compatible with VNC1L with 48-pin LQFP package.
  • RoHS compliant, and extended temperature support (-40°C to +85°C).
  • Enhanced features with Vinculum Software Tool Suite
  • Based on royalty-free flexible 'C' based Integrated Development Environment.
  • Includes compiler, drivers and RTOS kernel to support user firmware development.
  • Debug interface for real-time hardware based code debug.
  • Pre-compiled libraries for several USB classes including FAT file system support.

For sales and technical development support from our in-house engineering team, please contact the Alpha Micro team.

Part Number Package Type Pack Size
VNC2-32L1C-REEL 32-pin LQFP Reel of 1500
VNC2-32L1C-TRAY 32-pin LQFP Tray of 250
VNC2-32Q1C-REEL 32-pin QFN Reel of 3000
VNC2-32Q1C-TRAY 32-pin QFN Tray of 260
VNC2-48L1C-REEL 48-pin LQFP Reel of 1500
VNC2-48L1C-TRAY 48-pin LQFP Tray of 250
VNC2-48Q1C-REEL 48-pin QFN Reel of 3000
VNC2-48Q1C-TRAY 48-pin QFN Tray of 260

V2-EVAL Development Board with 5V/1A universal plug top PSU, USB A/B cable and USB gender changer. The V2-EVAL should be ordered with one of the following:

V2-EVAL-EXT32 32-pin QFN daughterboard
V2-EVAL-EXT48 48-pin QFN daughterboard


The V2-EVAL is a complete evaluation and prototyping platform for VNC2. The board features a VNC2 daughterboard site for connecting 32 and 48 pin VNC2 daughterboards. The board features USB connectors, I/O headers providing access to major VNC2 interfaces as well as a generous breadboard style prototyping area. The V2-EVAL is supplied as a kit together with power supply, USB cable and USB gender changer.

The V2-Eval kit includes the following hardware items as standard:

  • 1 x V2-Eval base board.
  • 1 x 5V/1A mains adapter PSU - UK, US, European and Japanese versions available.
  • 1 x USB A/B cable to connect to a host PC in programming / terminal emulation or debugging modes.
  • 1 x USB gender changer for USB slave mode applications.

Board specification:

  • Board supply voltage: 4.75V … 5.25V.
  • Board supply current: 60mA (with no USB devices on USB1 or USB2 port).
  • IO connectors power output: 5V/150mA, 3.3V/150mA.
  • Base board dimensions: 167mm x 156mm x 1.5mm (L x W x H).
  • VNC2 daughterboard dimensions: 37.9mm x 32.48mm x 10.0mm (L x W x H).

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Last updated: 21 May 2018