The CP2105, like the CP2104, is a highly-integrated USB-to-UART bridge controller providing a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space. The CP2105 includes all of the features of the CP2104 and adds a second UART interface. The same VCP drivers that are downloaded for free from the website are used to interface to these devices. User can also customize the USB vendor ID, product ID, product description string, power descriptor, device release number, interface strings, device serial number and GPIO configuration as desired for OEM applications using the on-chip one-time programmable ROM. An evaluation kit for the CP2105 (Part Number: CP2105EK) is available. It includes a CP2105-based USB-to-UART/RS-232 evaluation board, a complete set of VCP device drivers, USB and RS-232 cables and full documentation.