E21

E2 Series

E21

The SiFive E21 Standard Core is a high-performance, full-featured embedded processor designed to address advanced microcontroller applications such as Sensor Fusion, Smart IoT, Wearables, Connected Toys, and more. Separate Instruction and Data Buses, along with 2 banks of Tightly Integrated Memory (TIMs) make the E21 an ideal choice for applications with deterministic or demanding memory requirements.

E21的主要特征:

  • RISC-V ISA - RV32IMAC
     
  • Machine and User Mode with 4 Region Physical Memory Protection
     
  • 3-stage pipeline with Simultaneous Instruction and Data Access
     
  • 2 Banks of Tightly Integrated Memory
     
  • System, Peripheral, and Front Ports
     
  • CLIC interrupt controller with 127 interrupts
     
  • Advanced debug with 4 hardware breakpoints/watchpoints
     
  • 2.27/1.46 DMIPS/MHz (Best Effort/Legal)
     
  • 3.1 CoreMark/MHz

E2

Series Overview

E2系列

The E2 Series is highly-optimized for area and power while still offering class-leading performance. Targeted for microcontroller and embedded devices, the E2 Core can be configured to be as small as 13.5k gates with an efficient 2‑stage pipeline or configured for higher performance with a 3‑stage pipeline, hardware floating-point, instruction cache, and more.c

Using SiFive Core Designer the E2 Series can be fully customized to meet your specific requirements.

E2系列亮点

主要特征

  • Configurable core performance
  • Single precision Floating Point Unit
  • Custom memory map and ports
  • Optional Tightly Integrated Memory (TIM)
  • RV32E support with the smallest core configuration as small as 13.5k gates and is .005mm2 in 28nm

应用领域

  • MEMS Sensors
  • Power managment
  • Digital motor control
  • Low-power MCUs
  • Health wearable monitors
  • Environmental monitors

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