Description: The Waveshare FT232 USB UART Board ( Type A ) is an accessory board that features a USB to UART serial convertor. There is also a jumper used for selecting VCC output level provided on the board: Short the jumper to select output voltage level as 5V or 3.3V. In this case, the accessory board is powered from USB connection and provides power to the target application board. If the jumper is open, the accessory board should be powered from the target application board (3.3V-5V). The TXD, RXD, RTS and CTS are connected to the onboard soldered pinheaders, while the other pins are accessable on the drill holes, separate pinheaders (40-pin male and 40-pin female) are also provided. It supports Windows 8.