Automotive MCU targets high-end, integrated-systems applications

November 07, 2014 // By Graham Prophet
Renesas Electronics is offering an all-in-one solution that delivers functional safety, encryption, performance and communications for driver assistance systems that will ultimately enable self-driving cars

This introduction aims to reduce design complexities involved in developing self-driving car and other driver assistance systems. The RH850/P1x-C Series, a high-end version of the RH850/P1x Series of 32-bit automotive microcontrollers (MCUs), is designed for sensor fusion, gateway, and advanced chassis system applications.

“The new RH850/P1x-C are automotive safety MCUs that combine on a single-chip functional safety technology, security technology, and vehicle control network technology... we anticipate that the new series will become a de-facto standard for the sophisticated driver assistance systems of the future,” said Ryuji Omura, Executive Vice President, Renesas Electronics Corporation.

Renesas believes that solutions are required in four areas – safety, security, sensors, and networks – and has built on its experience to develop the RH850/P1x-C Series, which incorporates all four requirements on a single chip to deliver an all-in-one solution for driver assistance systems.

Functional safety is essential to ensure the driver assistance system is operating safely and normally and, should a fault occur, to ensure that safety is not compromised. Renesas has designed the RH850/P1x-C Series with a full complement of functions to support functional safety and comply with ASIL D (Note 1), the highest safety level stipulated in the ISO 26262 functional safety standard for road vehicles. The RH850/P1x-C Series is equipped with fault diagnostic functions ideal for automotive applications. Two CPUs with identical configurations operate in a lockstep system. Error check and correct (ECC) functionality detects and corrects data errors affecting memory, such as flash memory, and the internal buses. Fault detection functions for system diagnostics are also included in the peripheral functions. The built-in self-test (BIST) function can detect faults in the various fault detection function themselves. The error control module (ECM) allows users to manage error signal inputs, based on the circumstances, from the various functions, thereby helping to maintain system safety and reliability.

Security: In-vehicle, vehicle-to-vehicle, and vehicle-to-infrastructure network connectivity allows systems to obtain information on road conditions