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The time-triggered system-on-a-chip (TTSoC) architecture enables the realization of mixed-criticality systems using SoCs. The integration of subsystems with different criticality enables massive cost reduction by reducing the overall number of devices and networks (e.g., ECUs in car). To accomplish this goal, the TTSoC architecture offers inherent fault isolation mechanisms that prevent any unintended interference between application subsystems of different criticality. This paper demonstrates these capabilities using an exemplary automotive example with a safety-critical control subsystem and a multimedia subsystem. In the demo application, it is ensured by-construction that any design fault in the multimedia subsystem cannot have any adverse effect on the safety-critical control subsystem.