HiFive Unleashed Development Board

SiFive: HiFive Unleashed Development Board – First Linux-capable RISC-V single board computer

Last Updated on March 27, 2020

HiFive Unleashed

SiFive has announced their HiFive Unleashed, the first Linux RISC-V developer board.

RISC-V (pronounced “risk-five”) is an open instruction set architecture (ISA) based on established reduced instruction set computing (RISC) principles. RISC-V is an open source ISA that is not subject to patents, and is available under the BSD license.


The Freedom U540 is a 64-bit RISC-V CPU built on a 28nm process, with the following specifications:

HiFive Unleashed Development Board

  • Linux-capable RISC-V SoC
  • 4+1 Multi-Core Coherent Configuration, up to 1.5 GHz
  • 4x U54 RV64GC Application Cores with Sv39 Virtual Memory Support
  • 1x E51 RV64IMAC Management Core
  • Coherent 2MB L2 Cache
  • 64-bit DDR4 with ECC
  • 1x Gigabit Ethernet
  • Built in 28nm

The development board offers:

  • SiFive Freedom U540 SoC
  • 8GB DDR4 with ECC for serious application development
  • Gigabit Ethernet Port
  • 32MB Quad SPI Flash from ISSI
  • MicroSD Card for removable storage
  • FMC Connector for future expansion with add-in cards

Development boards start at $999 and will ship at the end of June 2018.


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