Fizzit is targeted at projects that require multiple CPU modules. It supports flexible interprocessor communication including an onboard USB hub, SPI, UART and TWI. In addition an onboard FPGA provides any-to-any cross connect of module digital IO pins.
To support multi-module development, fizzit adds USB and SWD pins to the Feather footprint. This means the baseboard can provide joint debug and USB connectivity simplifying fizzit specific modules.