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Benefits

  • Radiation-Aware Modeling – Test robustness against SEUs and TID.
  • Mission Assurance – Validate cache, DMA, and communication setups in simulated conditions.
  • Reduced Cost & Risk – Minimize reliance on late-stage radiation chamber testing.
  • Configurability – Explore multiple cache, memory, and speed options.
  • Proven in Space – RAD750 has powered the Europa probe, Mars rovers, satellites, and defense missions.

The RAD750 processor in VisualSim is a radiation-hardened CPU based on the PowerPC 750 Instruction Set Architecture (ISA). It provides a detailed model of the RAD750’s execution pipeline, cache and memory hierarchy, interconnects, and power consumption.

This library is especially valuable for space and aerospace applications, where designs must function reliably under cosmic radiation, single-event upsets (SEUs), and harsh thermal environments. By simulating the RAD750 in VisualSim, engineers can validate system performance and fault tolerance long before costly radiation testing in physical labs or flight missions.

VisualSim models referencing vendors are independent abstractions developed and validated using publicly available architectural and software information, are not endorsed by the original owner, and all trademarks and product names remain the exclusive property of their respective owners.

Overview

  • Complete RAD750 ISA Support – Full PowerPC 750 ISA implementation.
  • Multi-speed Configuration – Flexible processor speed scaling.
  • Cache & Memory Hierarchy – Configurable L2 cache (256 KB, 512 KB, 1 MB) and multiple DRAM speeds.
  • Bus & Interconnects – PCI, SpaceWire, and high-speed interconnect support.

Supported Standards

  • PowerPC 750 ISA
  • PCI Bus
  • SpaceWire Protocol

Key Parameters

  • PPC750_Speed_MHz – Processor frequency.
  • PPC750_L2_Cache – Configurable cache size.
  • PPC750_Core_to_Bus_Multiplier – Core/bus frequency ratio.

Simulation Results

  • Radiation Impact Studies – Reliability under simulated SEU/TID conditions.
  • Cache & Memory Behavior – Latency and hit/miss ratios.
  • DMA Throughput Reports – Data transfer efficiency across multiple channels.
  • System Communication Analysis – Sensor/processor board scaling.

Application

  • Satellites – Command and control systems for LEO, MEO, and GEO satellites.
  • Deep Space Missions – Radiation-hardened computing for Mars rovers, Europa probe, and asteroid missions.
  • Military & Defense – Secure, fault-tolerant embedded processors.
  • Aerospace Avionics – Navigation and mission-control computing under extreme radiation.
  • Mission-Critical Systems – Applications where reliability outweighs raw performance.

Integrations

  • Works with SpaceWire, PCI, DDR/SDRAM models.
  • Connects to bus interconnects and avionics networking components.
  • Integrates into system-level space mission simulations with payload, communication, and power subsystems.

View Demo

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