SLLU043B
4
TUSB3410UARTPDK
User’s
Guide
Figure 2.
Typical System Setup
Attach a serial device to the TUSB3410UART EVM using the serial cable and attach the EVM to
the PC using the USB cable. The first time you attach the EVM to the host PC, Windows
displays “bubble” information in the lower right corner, showing text that originates in the
EEPROM device located on the board. This is information you can customize for your product.
Also located in the EEPROM is a device descriptor containing a Vendor ID (VID) and Product ID
(PID). For the TUSB3410UART EVM, these values are 0x0451 (the VID assigned to TI by the
USB Implementers Forum) and 0x341A (the PID TI has assigned to this EVM), respectively.
The operating system uses the VID/PID combination to identify the type of device that has been
attached, and therefore what driver it needs to load. The VCP driver is configured to respond to
the 0451/341A VID/PID pair.
Furthermore, the EEPROM includes a string descriptor containing a serial number for this EVM.
The operating system uses the combination of the VID, PID, and serial number to distinguish
this particular EVM from other instances off this EVM. For example, COM port settings will be
associated with that particular combination of VID, PID, and serial number. Windows presents
the “Found New Hardware” dialog whenever it sees a new combination of these three values.
If the VCP installer setup was run before attaching the EVM, the installation will occur
automatically. If the installer was not run first, guide Windows to the correct INF files within the
installer directory.