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NEC touts first MCU to pass FlexRay conformance test

Posted: 30 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:automotive MCU? FlexRay conformance test? NEC MCU?


NEC Electronics has introduced the V850E/PHO3 MCU targeted at automotive chassis applications, its first device featuring an embedded FlexRay Communication Controller based on the E-Ray IP licensed from Robert Bosch GmbH.

According to TUV Nord Group's Institute for Vehicle Technology and Mobility, the official FlexRay protocol conformance test body nominated by the FlexRay consortium, the V850E/PHO3 is the world's first MCU which successfully passed the FlexRay Conformance Test in March. Based on 275 test cases, the test checks the correct functional behavior of the c as described in the current FlexRay v2.1 specification.

The chassis segment is known to be most challenging in terms of safety requirements. Many applications in this field are ranked SIL3 (IEC61508), respectively ASILC to ASILD (ISO26262). V850E/PHO3 actively supports the design of SIL3 conformant ECU's with high-efficient onboard safety diagnostics like ECC on flash, ECC on RAM, hardware CRC, redundant peripherals (like two independent ADCs), Core Self Test SW and an FPU suitable to implement diverse processing.

The chip is dedicated to automotive chassis applications using brushless DC motors like electronic power steering, electronic braking or damping and other vehicle stability control applications. With FlexRay expected to become the network of choice, V850E/PHO3 is extremely well prepared for such applications. Additionally providing a complete, ready-to-use AUTOSAR MCAL software stack for the V850E/PHO3, NEC Electronics enables quick design of standardized and re-usable application software.

The peripheral set of the V850E/PHO3 is compatible to its predecessor V850E/PHO2, providing an easy upgrade path as well as a scalable MCU solution. It is based on the V850E CPU core (including FPU) running at up to 128MHz clock speed. The embedded memory of 1Mbyte flash, 32Kbyte data flash and 60Kbyte of RAM offers huge space for complex application software. In addition to the FlexRay communication controller, the V850E/PHO3 is equipped with 2x CAN, 3x LIN-UART, 4x CSI interfaces and a 32bit non-mux bus interface enabling advanced network architectures. With its two ADCs, 14 independent multichannel PWM timer and two real time pulse it is optimized for inverter control applications enabling control of up to two three-phase brushless DC motors simultaneously with a highly efficient DMA reducing CPU load to a minimum. The V850E/PHO3 is hosted in a small footprint 357 BGA package.

- Henri Arnold
EE Times Europe

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