Systemchip baner vejen for selvkørende biler
Renesas Electronics udvikler nye teknologier til hardware fejldetektering, som understøtter funktionelle automotive sikkerhedsstandarder med sigte på autonomt kørende biler (in english).
Renesas Electronics has announced the development of hardware fault detection and prediction technologies for functional safety in automotive computing systems. Renesas has also successfully developed a prototype of an automotive computing system-on-chip (SoC) fabricated in a 16 nm FinFET process supporting the ISO 26262 ASIL B standard for automotive functional safety.Recently, there have been extensive activities in developing self-driving systems for vehicles, and it is expected that the autonomous-driving era will arrive by the year 2020. Created by the International Organization for Standardization (ISO), the ISO 26262 'Road vehicles - Functional safety' standard defines the entire safety life cycle for electronics and/or software in safety-related systems in vehicles weighing less than 3500 kg. Included in this are specific recommendations for the mitigation of random hardware faults, including diagnostics and/or the specific implementation of hardware safety systems.
When an internal fault occurs during driving, the automotive computing system used in an autonomous vehicle must either stop the vehicle safely or continue driving safely. Therefore, while SoCs for automotive computing systems have larger scales and more complex functions than earlier SoCs to process at high speeds and in short time periods that the large amount of data sent to them from cameras and other sensors, they are required to have safety mechanisms.
There are several approaches to hardware fault detection, such as logic duplication and self-testing. In these large-scale SoCs, the complexity of the functions and the high operating frequencies make it difficult to have duplicated logics for the overall functionality. Furthermore, to perform high-reliability self-testing in large-scale SoCs, it would be necessary to shut down functions required for self-driving and other operations for extended periods.
Renesas has developed hardware fault detection technology based on a state-of-the-art self-testing mechanism to resolve these issues. This technology makes it possible, even in the large-scale SoCs used in self-driving systems, to meet the criteria such as diagnostic coverage, which is expected to be required for the ISO 26262 ASIL B standard for functional safety.
In addition, Renesas has developed a system to predict and suppress the momentary voltage droops caused by hardware faults, and to prevent these faults from occurring.
