Overview
Description
The RH850/U2A MCU is the first member of Renesas’ cross-domain MCUs, a new generation of automotive-control devices, designed to address the growing need to integrate multiple applications into a single chip to realize unified electronic control units (ECUs) for the evolving electrical/electronic architecture (E/E architecture). Based on 28 nanometer (nm) process technology, the 32-bit RH850/U2A automotive MCU builds on key functions from Renesas’ RH850/Px Series for chassis control and RH850/Fx Series for body control to deliver improved performance.
This automotive-control MCU is equipped with up to four 400 megahertz (MHz) CPU cores in a dual-core lock-step structure. Each CPU core integrates a hardware-based virtualization-assisted function, which allows multiple software systems with varying ISO 26262 functional safety levels to operate independently without interference during high performance. It also reduces the virtualization overhead to maintain real-time execution. This enables users to integrate multiple ECU functions into a single ECU while maintaining safety, security, and real-time operation requirements.
The MCU includes security functions fulfilling EVITA Full for enhanced protection against cyber-attacks, enabling the device to support safe and rapid Full No-Wait Over-the-Air (OTA) software updates as security requirements evolve.
The RH850/U2A MCU is also equipped with an extensive set of networking interfaces, enabling the MCU to process the large amounts of sensor data being generated by multiple types of sensors in ADAS and autonomous driving functions. This allows customers to support future high-speed network functions and advanced communications throughput requirements.
Features
- Key Features:
- 400MHz speed for up to 4+4 (LockStep) RH850 G4MH CPUs
- Top-level ratio of performance vs. power consumption
- Up to 16MB Flash
- Up to 3.6MB RAM
- Up to 3 x ADC (12-bit), with a maximum of 94 channels, including 4+4 Track and Hold inputs
- GTM v3.5 vehicle motion timer
- Various generic timer modules including watchdog, OS, TAUx
- High-temperature support: up to Tj = 160 °C
- Low power consumption
- State of the Art Interfaces
- Up to 2x Ethernet AVB including Gbit and 100MBit
- CAN FD, FlexRay, SPI, RHSIF, SENT, LIN, UART, I2C, PSI5, CXPI
- SFMA (Serial flash memory interface)
- eMMC
- Support for Functional Safety (FuSa) and Security
- Security module with EVITA Full support
- ISO 26262 ASIL D
- Extensive ecosystem supporting the latest standards concerning tool, hardware and software areas
- Hypervisor support
Comparison
Applications
Design & Development
Software & Tools
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Resources
Partners
Vector Informatik GmbH
The MICROSAR evaluation package includes the Vector basic software according to AUTOSAR Classic as well as all necessary software tools.
Embien Technologies India Pvt.Ltd
Embien has been working with Renesas devices for 10+ years helping OEM's and Tier 1s create products for Industrial and Automotive segments.
Support Communities
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RH850/U2A how to count memory usage?
Hello Experts: Q1: I'm counting project ROM/RAM usage and currently want to count the generated memory map via python. Is there an out of box tool for it ? Q2: The gsh compiler generates some extra sections that I believe don't need to be counted in, are ...
Mar 27, 2024 -
Inquiry on RH850/U2A Motor Control Ecosystem and DAL-B (DO-178C) Support for High-Power BLDC Applications
Hi Team, I am currently assessing the RH850/U2A platform for use in safety-critical, high-power motor control systems, such as *** kW BLDC drives with DAL-B (DO-178C) requirements. While the platform shows strong potential in terms of safety compliance and processing performance, I would like to ...
Jun 20, 2025 -
SFMA for RH850 U2A
I try to communicate with Ext_Flash using SFMA module with SPI_Mode with these reg configs { SFMA0CMNCR=0x80FFF300; SFMA0SPBCR=0x00000400; SFMA0SSLDR=0x00000000; SFMA0SMENR=0; SFMA0SMDMCR=0; } I receive no data on the sfma Read Reg on the other hand when i configure it for QPI_Mode { SFMA0CMNCR=0x80000000; SFMA0SPBCR ...
Aug 7, 2024
FAQs
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RH850 U2A SVR parameter error
Try disabling the Set SVR Parameter option on the debug tool connect settings option and see if you are able to connect to the device.
Nov 7, 2024 -
Transmitter delay compensation (TDC) on RH850/U2A
Last updated: 11/7/2025 Question: What is the Transmitter delay compensation ? Answer: In case a high Baud Rate is used such as 5 to 8 Mbps for the Data phase, the Transmitter delay could become greater than TSEG1. In this case the transmitter would always detect a ...
Jan 1, 1970 -
RH850/F1x: Renesas MCU OTA support
... mapping (memory bank swap) RH850/F1KMS4 and D8 support RWW function which allows one bank of flash is read while another flash bank is in erase/writing status. But it does not support address mapping. RH850/U2A support RWW function and also (memory bank-swap) address mapping.
Jun 23, 2021
Videos & Training
Learn about two new automotive protocols and how efficient software design and hardware accelerators can lower processing demand in gateway applications.