Efinix Sapphire RV64 SoC

Worth knowing

Facts

The source is not on GitHub — an editor checks tests and license manually.

Maturity

M1 · Prototype

License

No license found

Tests

not found

CI

not found

Formal verification

not found

FuseSoC

not found

Source exists, but no tests were found. How maturity is assigned

Purpose

Configurable 64-bit RISC-V core for Efinix Trion, Titanium and Topaz FPGAs.

Boards

No one has confirmed a board run yet.

Sources

• The Sapphire RV64 SoC is described as a configurable and cached soft RISC-V SoC that optionally includes a DDR DRAM cont… · 2026-10-02
• The core is similar to the open-source VexiiRiscv but optimized for Trion and Titanium FPGAs (Efinix wording). · 2026-10-02
• One to four 64-bit RISC-V processors, each with instruction and data cache up to 8 ways, optional 64 KB to 512 KB L2 cac… · 2026-10-02
• The operating frequency is configurable from 20 to 400 MHz; the fMAX of the design limits the actual performance. · 2026-10-02
• Optional micro-architecture features include an FPU, a dynamic branch predictor, software and hardware prefetchers, cust… · 2026-10-02
• Peripherals include a CLINT timer, a platform-level interrupt controller, a watchdog, up to 5 I2C, up to 3 UART, up to 3… · 2026-10-02
• The memory controller supports DDR3, LPDDR4x or HyperRAM modules from 4 MB to 8 GB over one half-duplex AXI3 or one full… · 2026-10-02
• Debug follows the standard RISC-V debug specification with up to 4 hardware breakpoints and up to 4 performance counters… · 2026-10-02
• The SoC is configured in the Efinity IP Manager; the support page lists the Efinity RISC-V Embedded Software IDE, a data… · 2026-10-02
• The support page lists all Trion FPGAs except the T4 and all Titanium FPGAs; some features, such as the DDR controller,… · 2026-10-02
• The press release dated 28 September 2026 states availability for all Titanium FPGAs, all Topaz FPGAs and all Trion devi… · 2026-10-02
• The RV64 core implements RISC-V64IM with a seven-stage pipeline and optional A, F, D, C, Zba, Zbb, Zbs and Zicbom extens… · 2026-10-02
• The page states no licence terms for the core. · 2026-10-02