Specifications
IP Core
Efinix Sapphire RV64 soft RISC-V SoC
ISA
RISC-V RV64IM + optional A, F, D, C, Zba, Zbb, Zbs, Zicbom
CPU Cores
1 to 4 × 64-bit RISC-V (VexiiRiscv-derived, MIT-licensed)
Pipeline
Seven-stage in-order (fetch, decompress, decode, issue, execute, memory, writeback)
L1 Cache
Instruction and data cache, up to 8-way, 4 KB per way
L2 Cache
64 KB to 512 KB, 8-way (optional)
On-chip RAM
4 KB to 512 KB
MMU
Optional Sv39 — enables embedded Linux
Memory Controller
DDR3, HyperRAM, LPDDR4x up to 3,200 Mbps
Operating Frequency
20 to 400 MHz configurable (fMAX-limited)
FPGA Support
All Titanium and Topaz FPGAs; all Trion devices T20 and above
Performance (Ti375)
1.23–1.57 CoreMark/MHz; fMAX 250–278 MHz
Performance (Trion T120)
fMAX 65–77 MHz
Peripherals
1–5 APB3 slave, 2 AXI slave, 2 AXI master ports
Toolchain
Efinity IP Manager + Eclipse-based Efinity RISC-V IDE
Announcement
September 22, 2026
Overview
The Efinix Sapphire RV64 is a configurable 64-bit RISC-V soft SoC that extends the company's Sapphire processor family into multi-gigabyte-memory, high-performance territory. It is built from FPGA logic with DRAM reached through the device's hardened DDR interface, and derives from the MIT-licensed VexiiRiscv core.
Each of the one to four 64-bit cores implements RV64IM with optional A, F, D, C, Zba, Zbb, Zbs and Zicbom extensions on a seven-stage in-order pipeline. Designers can configure 4 KB to 512 KB of on-chip RAM, multi-way L1 caches, an optional L2 cache and branch predictor, and an optional Sv39 MMU that enables embedded Linux.
The memory controller supports DDR3, HyperRAM and LPDDR4x at up to 3,200 Mbps, and the core is available on all Titanium and Topaz FPGAs and on Trion devices T20 and above. It is configured through the Efinity IP Manager with a full RTL-to-bitstream flow and an Eclipse-based RISC-V software IDE.
Key Benefits
64-bit RISC-V with an optional Sv39 MMU for embedded Linux; configurable 1–4 cores and up to 512 KB L2 cache; an LPDDR4x memory controller at 3,200 Mbps for data-heavy edge AI; and free Efinity IP across Titanium, Topaz and Trion families.
Applications
Embedded Linux processing in FPGA designs, edge AI and vision pipelines, motor control, industrial networking, custom SoC designs and FPGA-accelerated data acquisition.
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