U8 Series

U84

The SiFive U84 Standard Core is a single-core instantiation of our most scalable out-of-order RISC-V application processor, and is capable of supporting full-featured operating systems such as Linux.

The U84 is feature rich and architected for high performance/area or watt, making it ideal for various target markets (e.g., edge/autonomous, enterprise/networking and consumer markets).

U84 Key Features
  • Fully-compliant with the RISC-V ISA specification
  • RV64GC U84 Application Core
    • 32KB L1 I-cache with ECC
    • 32KB L1 D-cache with ECC
    • 8 Region Physical Memory Protection
    • Sv39 Virtual Memory support

  • Integrated L2- Cache with ECC
U8 Series
Cortex-A72
Architecture
RV64GC
Arm v8.0
Vectors
Yes
No
Cluster Core Count
9
4
Real-Time Capabilities
Real-time capable
No
Heterogeneous Compute
Mix + Match Available
Not Available
Real-Time Capabilities
Real-Time Capable
No
Interrupt Controller
Integrated
Licensed Separately; requires separate integration
Memory Map
Customizable
Fixed
FPU
Removable
Not Removable
Mixed Precision FP
Available
No
Extensibility
Custom Instructions via SCIE
NA

U84 Development Kit

Dev Kit Deliverables

  • RTL Evaluation
  • Test Bench RTL
  • Software Development Kit
  • Documentation
U8
Series Overview

U8 Series

The U8 Series features SiFive’s maximum performance RISC-V Linux-capable application processor. The U8 core has a 3 issue out-of-order superscalar with support for virtual memory. The U8 Series provides unprecedented scalability and is optimized for the highest performance per watt. This makes it ideal for applications such as edge compute, 5G base stations and AR/VR/MR.

U8 Series Highlights

Key Features

  • Fully-compliant with the RISC-V ISA specification
  • Up to 8+1 coherent high-performance RISC-V application processors
  • Supports an in-cluster coherent combination of application processors with real-time processors (U and S cores)
  • Low latency composable caches
  • Application processors with deterministic response
  • High -performance L1 memory microarchitecture
  • Physical memory protection
  • Custom instructions via SCIE for workload- specific customizations
  • Mixed precision floating point unit capability
  • Private cache /cache locking capability for mission critical computing

Applications

  • Enterprise Switching/Routing/Storage, Smart NICs
  • Edge Analytics, Big-Data Analytics
  • Autonomous Machines
  • Edge Compute
  • 5G Infrastructure/Base Stations
  • AR/VR/MR/XR

All Standard Cores

Area
Standard Cores
ARM Comparison
E2 Series
M0, M0+, M3, M4, M23, M33
E3 Series
R4, R5
E7 Series
M7, R7, R8
S2 Series
***
S5 Series
R4, R5
S7 Series
M7, R7, R8
U5 Series
A5, A7, A35, A53
U7 Series
A55
U8 Series
A72, A73
Core Evaluation

From idea to reality.

Ready to see your code in action? The U84 Development Kit enables free evaluation of SiFive RISC-V Core IP.

Key
Deliverables

Evaluation RTL

  • Full-Functional, synthesizable Verilog RTL
  • Run it in your own simulator
  • Simple, no-cost evaluation license
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