App note from FTDI on interfacing the FT800 to an 8-bit MCU. Link is here
The FTDI FT800 video controller offers a low cost solution for embedded graphics requirements. In addition to the graphics, resistive touch inputs and an audio output provide a complete human machine interface to the outside world.
This application note will provide a simple example of developing MCU code to control the FT800 over SPI. The principles demonstrated can then be used to produce more complex applications.