功能安全是一个汽车MCU的工作
复杂性和汽车技术的成熟使所有芯片制造商提出新的挑战,其中最重要的是单片机的公司。安全是“工作一”,如何确保安全车辆是一项庞大的事业。
改进的抗噪性和鲁棒性,错误检测和片上备份系统,以帮助从意外事件中恢复比重要的汽车MCU功能,他们也需要以实现行业标准认证。几乎所有的汽车子系统都有一些涉及安全的方面。因此,会议的功能安全要求可能是具有挑战性的系统设计人员,特别是因为他们同时管理日益增长的应用程序的复杂性。基本方法是建筑师系统,以防止完全危险的故障或控制他们时,他们发生。
To that end and true to the rigor that is characteristic of the automotive industry, functional safety is well defined. The functional safety standard IEC 61508 and its automotive adaptation ISO 26262 were created to ensure acceptable levels of safety. IEC 61508 defines four general Safety Integrity Levels (SILs) across many industries with SIL 4 being the most stringent level.
ISO 26262—adopted in 2011—takes safety requirements to a deeper level. It defines four Automotive Safety Integrity Levels (ASILs) with ASIL D ranking as the most stringent safety level. Each level corresponds to a range of target likelihood of failures of a safety function.
ISO 26262 also defines a series of steps to assign an acceptable level of risk for a system, to minimize errors during the product development process, and to determine if the end product achieves the required level of functional safety.
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