The UMFT311EV is a development module for the FT311D. The module allows for selection of each FT311D interfaces: GPIO, UART, PWM, I²C Master, SPI Slave, or SPI Master. The module provides a USB type A connector with power switch to control the 5 V supply to the USB port. The UMFT311GP is a PCB with 8 buttons and 8 LEDs. It may be plugged into an FT311D development board to test GPIO operation. The module also has a power socket to accept 5 VDC, allowing power for the FT311D via an onboard 3.3 V regulator and the connected Android device.