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Overview

Gemini is the industry’ s first and only fully configurable cache-coherent network-on-chip IP. Gemini is designed for SoCs that have cache-coherent clusters of processor cores such as CPUs, GPUs, or DSPs. Gemini provides the same features and benefits as Orion plus the ability to handle cache-coherent, I/O-coherent, and non-coherent traffic in a single NoC.

Benefits

Based on system requirements such as cache capacity and total coherent bandwidth, Gemini adds critical coherency components, and customizes them before placing them in the interconnect. Gemini uses a distributed architecture and an innovative directory-based design that enables architects to scale both the interconnect fabric and the coherency components up or down independently.

  • Lower latency by placing controllers and caches where they are accessed the most
  • Adjust cache hierarchy to support floorplan requirements
  • Improve die utilization by placing caches in empty die space

Applications

Networking, IoT, Custom ASIC, Cloud Computing, Mobile, Digital Home, Storage, Networking, Automotive

Block Diagram

Features

  • Low Power: Support for multiple power domains, voltage domains through industry standard power control interface to support management of power state transitions.
  • Protocol Support: Support for industry standard IP protocols, and custom proprietary protocols.
  • Quality of Service: Robust, configurable end-to-end QoS schemes: Bandwidth allocation, strict non-blocking priority levels, rate limiters.
  • Virtual Channels: Up to 32 virtual network support in the NoC; Virtual channels are allocated to ensure QoS, deadlock avoidance and bandwidth intent satisfaction.
  • Physically Aware: Adapts to floorplan and uses placement information to automate timing closure and thus creates a design that is ready for first-pass timing closure.
  • Highly Configurable: Customize every component of the interconnect from IP interface to routers to topology and interface links using NocStudio.
  • Correct-by-construction: Graph theory based approach and formal techniques to ensure an application level deadlock-free interconnect solution.
  • Multi-layered Security: Sophisticated multi-tiered security and firewall support.

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