E31

E3 Series

E31

The SiFive E31 Standard Core is the world’s most deployed RISC-V core. Co-designed alongside the RISC-V ISA, the E31 takes maximum advantage of the RISC-V ISA, resulting in a power-efficient core that delivers the high performance needed for tomorrow’s smart IoT, storage, and industrial applications.

E31的主要特征:

  • Fully compliant with the RISC-V ISA specification
     
  • RV32IMAC Support
    • RV32I – 32-bit RISC-V with 32 integer registers
    • Integer Multiplication and Division (M) support
    • Atomic Mode (A) support for high-performance, portable software
    • Compressed Mode (C) support for better code density
  • Machine and User Mode Support
     
  • In-order, 5-6 stage variable pipeline
     
  • Advanced Memory Subsystem
    • 16KB, 2-way Instruction Cache
    • Instruction Tightly Integrated Memory (ITIM) option
    • Up to 64KB Data Tightly Integrated Memory (DTIM) support
  • Efficient and Flexible Interrupts
    • Local interrupts w/ vectored addresses — up to 16
    • Platform Level Interrupt Controller (PLIC) — 128 interrupts w/ 7 priority levels
    • RISC-V Core Local Interruptor (CLINT) — 1 timer, 1 SW
  • 8-Region Physical Memory Protection (PMP)
     
  • High performance TileLink Interface
     
  • 2.58/1.61 DMIPS/MHz (Best Effort/Legal)
     
  • 3.01 CoreMark/MHz

E3

Series Overview

E3系列

The E3 Series is highly-integrated and feature-rich. It includes the E31 Core, which is the most widely deployed RISC‑V core in the world. E3 embedded cores have a 5-6 stage pipeline, offering a great balance between performance and efficiency.

E3系列亮点

主要特征

  • Up to 8 coherent E3 Cores and optional L2 Cache Controller
  • Configurable core performance
  • Single precision Floating Point Unit
  • Level 1 Memory System and ECC
  • Number, type, and width of bus interfaces

应用领域

  • Consumer Electronics
  • Motor Control
  • Industrial Automation
  • Storage
  • High-performance embedded

所有标准核心

CoresAreaStandard CoresARM Comparison
E2 系列 E20 ,E21 ,E24

M0, M0+, M3, M4, M23, M33

E3 系列 E31 ,E31

R4, R5

E7 系列 E76 ,E76-MC

M7, R7, R8

S2 系列 S21

***

S5 系列 S51 ,S54

R4, R5

S7 系列 S76 ,S76-MC

M7, R7, R8

U5 系列 U54 ,U54-MC

A5, A7, A35, A53

U7 系列 U74 ,U74-MC

A55