RIX-SoC

RIX-SoC is a compact 8-bit system-on-chip designed for a 1x2 Tiny Tapeout tile. It integrates a custom CPU core, an SPI memory controller for external Flash and SRAM, and a UART on a single die.

RIX8

RIX8 is a compact 8-bit CPU with a custom 16-bit fixed-length instruction set. Its multi-cycle execution model, 8 general-purpose registers, and 16-bit address space keep the core small and predictable, leaving room for the SoC peripherals.

• Data width: 8-bit
• Instruction width: 16-bit fixed
• Execution model: Multi-cycle
• Registers: 8 general-purpose 8-bit registers
• Address space: 16-bit (64 KB)

Peripherals

• SPI Flash controller with prefetch buffer for instruction fetch
• UART for serial I/O
• Memory-mapped I/O for peripheral access