Rev. 2.0 10/10

Copyright © 2010 by Silicon Laboratories

AN144

AN144

Relevant Devices

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This application note applies to the following devices:

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CP2101, CP2102, CP2103, CP2104, CP2105, CP2110, CP2112

1. Introduction

This document is intended for developers creating products based on the CP210x/CP211x USB Bridge Controllers.

It provides information about obtaining a Vendor ID (VID) and Product ID (PID) for a CP210x/CP211x product and

describes the steps necessary for customizing the device descriptors contained in the CP210x/CP211x

programmable area. Refer to www.silabs.com for the latest revisions of this document and other application notes

related to the CP210x/CP211x device families.

2. Obtaining a VID and PID

Each device on a USB bus must have a unique VID, PID, and Serial Number combination. Vendor IDs are owned

by the vendor company and assigned by the USB Implementers Forum (USB-IF) only. Details about obtaining a

unique VID can be found at www.usb.org/developers/vendor.

To obtain the right to license the USB-IF logo, you must register your product's VID and PID with USB-IF and

submit your product to the USB-IF Compliance Program. USB-IF Compliance Program details are available at

www.usb.org/developers/compliance. Once your product is certified, you can add it to the USB-IF Integrators List,

and you can also use the “Certified USB” logo on your product.

If you do not wish to license the USB-IF logo for your product, you can use the default Silicon Laboratories VID

along with a unique PID. To obtain a unique PID for your CP210x/CP211x-based product, visit

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VID, PID, and Serial Number will appear on the same USB bus.

3. Customizing Driver Installations, CP210x Custom Setup Utility

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(CP2101/2/3/4/5)

The driver installation is customizable by modifying certain sections of the hardware installation files (.inf). The

strings contained in the .inf files affect what is displayed in the “Found New Hardware Wizard” dialogs, Device

Manager, and the Registry. Refer to “AN220: USB Driver Customization” for more details.