The second FTDI interface available is FTDI’s Java D2xx driver, supporting the USB host class library. This interface requires the Android platform to support USB host and be running OS version 3.2 onward. The Java driver supports FTDI’s full complement of USB bridge slave chips including R Chips (232R/245R), H- Series (USB2.0 Hi-Speed), and the X-Chip Series. The Vinculum-II is also supported when one of its USB device ports is configured for FT232 emulation. This library requires no special root access privileges to load the driver and can be easily adapted into applications by developers. The API is packaged in d2xx.jar and is distributed with demo application source code available online at http://www.ftdichip.com/Android.htm.  With this interface option, the Android platform is responsible for providing the USB power.