Multiprocessor SoCs (MPSoCs) are deployed in intelligent Rear View Camera Systems (iRVCS) for capture, analytics and display. iRVCS, mounted near the car's exterior surface, are subject to direct sunlight for prolonged time. At high junction temperatures (Tj) iRVCS completely shuts down for thermal protection resulting in complete loss of visibility. The paper focuses on techniques to detect such conditions and switch to a Limp Home Mode (LHM) with basic rear view visibility. When Tj reduces, it seamlessly switches back to original usecase. Results showed the switch takes < 350 milliseconds achieving 20–25% power savings (5°C cooler) at high ambient temperatures.
['Piyali Goswami', 'Yogesh Marathe', 'Kedar Chitnis', 'Koichi Saito']
Thermal safety through Limp Home Mode for intelligent Rear View Camera Systems