The USB2.0 Hi-Speed to MPSSE SPI Module,VA800A-SPI, is a small electronic circuit board, utilising the FTDI FT232H. The 10 pin connector on the module fits directly to the FTDI VM800B and VM800C graphic display modules.
This allows direct control of the EVE FT800 devices with an SPI interface from a USB host.
Full details of the VA800A-SPI module can be found here. All USB signalling and protocols are handled on the module. For full details of the FT232H IC, consult the FT232H datasheet