With Silicon Labs’ CP21xx USB bridge products, customers can easily add USB connectivity to their application. No USB expertise or software development is required. The ease of use makes these bridge products ideal for upgrading legacy designs with USB communication or for adding USB to new designs. The CP2130 utilizes the royalty-free WinUSB driver package, which is included in Windows and is built, supported and maintained by Microsoft. All that is needed is the provided installation (INF) file to use the CP2130. For other operating systems, open access to the interface specification is available through application note AN792. In addition to the WinUSB/LibUSB drivers used by the CP2130, Silicon Labs offers other driver packages for the CP21xx family of devices, including a Virtual Com Port (VCP) and USBXpress® packages on CP210x devices as well as Human Interface Devices (HID, USB Audio) on the CP211x devices.