SiFive E31
SiFive · Essential E 系列
32 bit
In production
Commercial license
MPUReal-time
Bit width
32bit
Max frequency
Not published
Pipeline
2–8 级、单/双发射顺序（E 系列 Gen4 可配置）
CoreMark/MHz
—
License
Commercial license
Maturity
In production
Architecture and ISA
| Vendor / Origin | SiFive（United States） |
|---|---|
| Bits / ISA | 32 bit · RV32IMAC |
| Pipeline | 2–8 级、单/双发射顺序（E 系列 Gen4 可配置） The vendor or source notes are in Chinese in the original |
| Features | MPU Real-time |
| Max frequency | Not published |
Ecosystem and toolchain
| Toolchain | SiFive Freedom Studio / RISC-V GNU Toolchain |
|---|---|
| Operating systems | FreeRTOS / Zephyr / 裸机 |
| Representative silicon | — |
| MCUs with this brand in the catalog | 5 MCU (not all of them use this core) |
Sources and notes
The vendor or source notes are in Chinese in the original 与 E21 相同，SiFive 现以 Essential E 系列 Gen4 统一描述（32 位、2–8 级、单/双发射、最高 2.9 DMIPS/MHz）。E31 的公开定位为 RV32IMAC；官方单核页面已不提供独立级数/频率，故相应字段取系列范围或 null。
Last verified 2026-11-04