32-bit radar MCU targets ADAS, self-driving cars

Article By : Renesas Electronics

The RH850/V1R-M MCU includes optimised, programmable digital signal processing, a dual core at 320MHz with 2MB flash and a 2MB internal RAM.

Renesas Electronics has announced its first RH850-based, 32-bit, automotive radar microcontroller series, the RH850/V1R, that it claims will power future advanced driver assistance systems (ADAS) and autonomous driving vehicles.

With the expansion of ADAS and autonomous driving, sensors are fast becoming a key technology. Currently vehicles are being equipped with a broad spectrum of sensors such as cameras, lidar and ultrasonic sensors. In particular, radar sensors are required for ADAS applications, including advanced emergency braking and adaptive cruise control, because, unlike other sensors, radar sensors are not negatively affected by external environmental limitations which includes adverse weather conditions, such as rain, fog or whether the sun is shining or not.

The RH850/V1R-M MCU is specifically designed for radar applications in ADAS. The new MCU includes optimised, programmable digital signal processing, a dual core at 320MHz with high speed flash of 2MB as well as a 2MB internal RAM.

The MCU is designed to have optimised hardware acceleration in the DSP, which allows the system developers to process the raw data into target objects efficiently, separately from the safety relevant classification and tracking done in the CPUs. Renesas’ DSP performs radar specific algorithms such as fast fourier transforms (FFTs), beamforming, windowing, channel calibration, peak search, at high speed and with low power consumption. The DSP offers high flexible programmability and Renesas specifically developed a DSP math library for automotive radar sensors to support system developers in their algorithm development.

The RH850/V1R-M is developed using Renesas’ 40nm embedded eFlash process. It also has the merit of low power consumption as the transistors are smaller lowering parasitic capacitances. The process specification of RH850/V1R-M also fulfils the highest temperature requirements in the industry (T-junction 150°C). The embedded flash brings advantage to the system designer by offering higher integration using less PCB space and better real time behaviour.

Samples of the RH850/V1R-M and the DSP math library will be available from second half of 2017. Samples will be priced at $30 per unit. Mass production is scheduled to begin in November 2018. A flexible programmable complete toolchain with C/C++ compiler, debugger, simulation models and detailed performance profiling tools will also be available.

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