功能安全是一個汽車MCU的工作

　　復雜性和汽車技術的成熟使所有芯片制造商提出新的挑戰，其中最重要的是單片機的公司。安全是“工作一”，如何確保安全車輛是一項龐大的事業。

　　改進的抗噪性和魯棒性，錯誤檢測和片上備份系統，以幫助從意外事件中恢復比重要的汽車MCU功能，他們也需要以實現行業標準認證。幾乎所有的汽車子系統都有一些涉及安全的方面。因此，會議的功能安全要求可能是具有挑戰性的系統設計人員，特別是因為他們同時管理日益增長的應用程序的復雜性?；痉椒ㄊ墙ㄖ熛到y，以防止完全危險的故障或控制他們時，他們發生。

　　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.