The FT311D is a Full Speed USB host specifically targeted at providing access to peripheral hardware from an Android platform with a USB device port. The device will bridge the USB port to six user selectable interface types and has the following advanced

features:
 Single chip USB to selectable interface.
 Entire USB protocol handled on the chip. No USB specific firmware programming required.
 Interface options selectable via 3 mode select pins.
 7 GPIO lines interface option
 Basic UART interface with RXD, TXD, RTS, CTS pins option.
 TX_ACTIVE signal for controlling transceivers on RS485 interfaces.
 4 PWM channels option.
 I2C master interface option.
 SPI Slave interface option supporting modes 0, 1, 2 and 3 with MSB/LSB options
 SPI Master interface option supporting modes 0, 1, 2 and 3 with MSB/LSB options.
 USB error indicator pin
 Suitable for use on any Android platform supporting Android Open Accessory Mode (Typically 3.1 onwards, however some platforms may port Open Accessory Mode to version 2.3.4)
 12MHz oscillator using external crystal.
 Integrated power-on-reset circuit.
 +3V3 Single Supply Operation with 5V tolerant inputs.
 USB 2.0 Full Speed compatible.
 Extended operating temperature range; -40⁰C to 85⁰C.
 Available in compact Pb-free 32 Pin LQFP and QFN packages (both RoHS compliant).