Future Technology
Devices International Ltd.
http://www.vinculum.com
Copyright © Future Technology Devices International Ltd. 2007
VF2F2
USB Flash Disk File-to-le Transfer
Vinculum Evaluation Kit
™
™
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 2
1.2 Features
• Uses F.T.D.I.’s VNC1L embedded USB host controller I.C. device.Uses F.T.D.I.’s VNC1L embedded USB host controller I.C. device.
• On-board DC-DC converter supplies the circuitry with 5V and 3.3V power from 2 x AAA cells.On-board DC-DC converter supplies the circuitry with 5V and 3.3V power from 2 x AAA cells.
Vinculum website.
• Assembled VF2F2 PCB available for evaluation.VF2F2 PCB available for evaluation.
1. Introduction and Features
1.1 Introduction
The VF2F2 is a reference design for the Vinculum VNC1L . It is designed as a stand alone application which allows
for the back up of les from a digital camera onto a USB Flash disk. The project is also available from FTDI as
an evaluation kit. This datasheet describes the VF2F2 reference design and evaluation kit, as well as the VNC1L
rmware (VDFC) which it uses.
The VF2F2 illustrates how to construct a le backup device for a digital camera with USB Mass storage class
interface. At the push of a button, all the picture les on the camera are copied to a unique folder on a USB Flash disk
so that the digital camera memory can be re-used to take further pictures. This is an ideal accessory for digital camera
users who wish to backup their photos on the road without having to carry a notebook PC, or for people who want to
share or swap their photos without requiring a card reader. The VF2F2 is powered by two AAA size alkaline batteries.
In addition this reference design and evaluation kit could be used with other USB mass storage class devices such as
MP3 players, or even for copying les directly from one USB ash disk onto another.
The Vinculum VNC1L is the rst of F.T.D.I.’s Vinculum family of Embedded USB host controller integrated circuit
devices. Not only is it able to handle the USB Host Interface, and data transfer functions but owing to the inbuilt MCU
and embedded Flash memory, Vinculum can encapsulate the USB device classes as well. When interfacing to mass
storage devices such as USB Flash drives, Vinculum also transparently handles the FAT File structure communicating
via UART, SPI or parallel FIFO interfaces via a simple to implement command set. Vinculum provides a new cost
effective solution for providing USB Host capability into products that previously did not have the hardware resources
available. The VNC1L-1A is available in Pb-free (RoHS compliant) compact 48-Lead LQFP package.
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 3
2. Function and Operation
2.1 Button Functions
2.2 USB Interface Ports
Button 1
Button 2
Button 3
Button 4
USB Port 1
USB Port 2
Figure 2 - VF2F2 USB Port Interface
USB Port 1
USB Port 2
The two red / green LED’s will indicate the status of the USB device connected. These two LED’s will be off when
transfer to begin.
Button 1 - Power on. Press and hold for 200 ms to switch
on the VF2F2. The Yellow LED indicates that the board is
powered. The board will auto-power off after 30 seconds
in order to conserve battery power.
Button 2
Button 3 - Initiates data transfer from the source device
on USB Port 1 to the target device on USB Port 2. The
four green LED’s will display a cascade effect from USB
Port 1 to USB Port 2 during data transfer
Button 4 - Power off. Press and hold for at least 200 ms
to power down the VF2F2.
Figure 1 - VF2F Button interface
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 4
2.3 Programming Header Interface
Vinculum website.
Pin No. Name Type Description
1 Input
2 Input
3 Signal ground
4 Output
5 3.3V power input
6 Input
7 Output Transmit asynchronous data output
8 Input
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 5
3. Firmware
VNC1L-1A
PORT ACPORT BD
PORT BC
Central
Hardware
Core
UART
Interface Select
Command
Monitor
Monitor is
GPIO
Monitor
Is UART
Monitor Select
Sel
PORT AD
Firmware
USB Port 2
USB Port 1
USB
Flash Disk
USB
Flash Disk
USB Mass Storage
Class Source Device
Target Device
GPIO
PROG# RESET#
Digital Camera
Or
3.1 File to File Transfer with GPIO (Button) Interface (VDFC)
-
used to provide a simple push button user interface which is effectively acting as the VNC1L’s command monitor port
in this case.
Figure 3 - VDFC Firmware model
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 6
4.1 VF2F2 Board Dimensions
4. Dimensions
The VF2F2 board dimensions are shown below.
Figure 4 - VF2F2, top view.
Figure 5 - VF2F2, side view.
19.7 mm /
0.8"
69.8 mm / 2.7"
50.9 mm / 2.0"
23.5 mm /
0.9"
19.8 mm /
0.8"
44.8 mm /
1.8"
14.5 mm /
0.6"
9.0 mm /
0.6"
9.0 mm /
0.6"
13.00mm
(0.5")
50.00 +/-20.00mm
(2.0+/-0.8")
1.7mm
(0.07")
1.7mm
(0.07")
11.4mm
(0.45")
VF2F2 USB Flash Disk FIle-to-File Transfer
Vinculum Evaluation Kit Datasheet Version 0.90 © Future Technology Devices International Ltd. 2007
Page 7
Disclaimer
Copyright © Future Technology Devices International Limited , 2007.
Version 0.90 - Initial Datasheet Created March 2007
Neither the whole nor any part of the information contained in, or the product described in this manual, may be
adapted or reproduced in any material or electronic form without the prior written consent of the copyright holder.
This product and its documentation are supplied on an as-is basis and no warranty as to their suitability for any
particular purpose is either made or implied.
Future Technology Devices International Ltd. will not accept any claim for damages howsoever arising as a result of
use or failure of this product. Your statutory rights are not affected.
This product or any variant of it is not intended for use in any medical appliance, device or system in which the failure
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