功能安全是一個(gè)汽車(chē)MCU的工作

　　復(fù)雜性和汽車(chē)技術(shù)的成熟使所有芯片制造商提出新的挑戰(zhàn)，其中最重要的是單片機(jī)的公司。安全是“工作一”，如何確保安全車(chē)輛是一項(xiàng)龐大的事業(yè)。

　　改進(jìn)的抗噪性和魯棒性，錯(cuò)誤檢測(cè)和片上備份系統(tǒng)，以幫助從意外事件中恢復(fù)比重要的汽車(chē)MCU功能，他們也需要以實(shí)現(xiàn)行業(yè)標(biāo)準(zhǔn)認(rèn)證。幾乎所有的汽車(chē)子系統(tǒng)都有一些涉及安全的方面。因此，會(huì)議的功能安全要求可能是具有挑戰(zhàn)性的系統(tǒng)設(shè)計(jì)人員，特別是因?yàn)樗麄兺瑫r(shí)管理日益增長(zhǎng)的應(yīng)用程序的復(fù)雜性。基本方法是建筑師系統(tǒng)，以防止完全危險(xiǎn)的故障或控制他們時(shí)，他們發(fā)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.