Freedom U540

The Freedom U540 is a microprocessor using the RISC-V open architecture by fabless semiconductor company SiFive that is used to power the HiFive Unleashed computer.[1][2] The U540 is one of the first commercially available microprocessors to use the RISC-V architecture, which is in contrast to the majority of the market, which uses mostly proprietary x86 and ARM microarchitectures. As the U540 was designed specifically for the HFU, it is not available on other devices or as a standalone component.

Freedom U540
General information
LaunchedEarly 2018
Designed bySiFive
Architecture and classification
Min. feature size28nm
Instruction setRISC-V
Physical specifications
Cores
  • 4

The U540 has a partial compatibility with coreboot.[3]

References
  1. "Hi-Five Unleashed: The first Linux-capable RISC-V single board computer is here". TechRepublic.
  2. "SiFive - HiFive Unleashed". SiFive.
  3. "Mainboard-specific documentation > SiFive HiFive Unleashed". doc.coreboot.org. Retrieved 23 July 2019.
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