Renesas expands 28nm cross-domain automotive control MCU portfolio

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Renesas Electronics has introduced a new group of microcontrollers (MCUs), the RH850/U2B MCUs, designed to address the need to integrate multiple applications into a single chip and to deliver a unified electronic control unit (ECU).

Delivering higher levels of performance, flexibility and security, the cross-domain RH850/U2B MCUs have been built for the workloads required by vehicle motion in terms of hybrid ICE and xEV traction inverter, high-end zone control, connected gateway, and domain control applications.

These new devices expand Renesas' cross-domain MCU portfolio with devices that range from RH850/U2A MCUs for body and chassis control systems up to high-performance RH850/U2B MCUs. Customers will be able to combine these MCUs with Renesas’ R-Car S4 system-on-chip devices for automotive central gateway systems to build a scalable solution for E/E architectures.

“The future of automotive systems design lies in a vehicle-centralised, zone-oriented E/E architecture, which elevates the need for automotive chips that address the challenges these innovative architectures create for future vehicle generations,” said Naoki Yoshida, Vice President, Automotive Digital Products Marketing Division at Renesas. “The RH850/U2B MCUs offer customers higher levels of performance, memory integration, and hardware-based support for new zone- and domain-control applications, particularly for powertrain and HEV/EV, while maintaining the stringent cost, safety, and security parameters required for these automotive systems.”

Designed for zone and domain applications, the 28nm RH850/U2B MCUs build on key functions from Renesas’ RH850/E2x Series for powertrain and RH850/C1M-Ax Series for HEV/EV motor control, while adding several new enhancements including new accelerator IP, higher performance levels, and increased security. This combination will enable users to integrate multiple ECU functions into a single ECU while adhering to stringent automotive-grade safety, security, and real-time operation requirements.

The MCU’s integrated hypervisor hardware-based virtualization assist function allows multiple software systems with up to ISO26262 ASIL D functional safety levels to operate independently, without interference, during high performance, and reduces the virtualization overhead to maintain real-time execution.

Quality-of-Service (QoS) provides a latency monitor and regulation function for all bus masters to ensure minimum bandwidth is always available. The RH850/U2B MCUs support safe and rapid full no-wait OTA software updates with dual-bank embedded flash that allows the ECU to update and save images while the MCUs are in active mode and enables the ECU to operate from the original code if a failure occurs. Integrated motor control accelerator IP (EMU3S) works in conjunction with multiple dedicated motor control timer structures like GTM v4.1 and TSG3 to dramatically reduce CPU processing loads while achieving high-speed rotation.

Dedicated data flow processor (DFP) accelerator IP enables the CPU to offload compute-heavy operations for complex control.