Renesas RH850/U2B automotive SoC features RISC-V-based parallel co-processor

Renesas Electronics RH850/U2B is an automotive SoC designed for electronic control unit (ECU) with used for hybrid ICE and xEV traction inverter, high-end zone control, connected gateways, and vehicle motion applications.

The processor includes up to eight 400MHz RH850 32-bit RISC performance cores with four of them in lockstep architecture for ASIL-D and ASIL-B compliance, as well as DR1000C RISC-V-based parallel co-processor (data flow processor) with vector extension (DFP) from NSITEXE designed to support “the fast execution of complex mathematical algorithms”.

Renesas RH850/U2B

Renesas RH850/U2B key features & specifications:

  • CPU cores – 400MHz speed for up to 8+4 (LockStep) RH850 G4MH CPUs
  • Memory – Up to 5.1MB RAM on-chip
  • Storage
    • Up to 32MB Flash on-chip
    • SFMA (Serial flash memory interface), eMMC interfaces for external storage
  • Co-Processor – DR1000C RISC-V based MIMD high-performance embedded vector processor
  • Embedded EMU3S (Embedded motor control unit), RDC3X (Position sensor interface), TSG3 (motor timer) for field-oriented traction motor (inverter) control, GTM v4.1 vehicle motion timer
  • Peripherals
    • Up to 2x Gigabit Ethernet TSN including a switch function (RSwitch)
    • Up to 5x ADC (12-bit), with a maximum of 128 channels, including 4+4+2+2 Track and Hold inputs
    • Up to 14x DS-ADCs with a Digital Filter Engine
  • FuSa and Security
    • Security module with EVITA Full support
    • ISO26262 ASIL-D
  • Temperature support up to 160°C Tj
DR1000 RISC-V vector processor
DR1000(C) block diagram

NSITEXE is not some Windows executable, but the name of an IP vendor, established in 2017 as a spin-off from DENSO Corp., who designed the DR1000C among other advanced processors. The RISC-V-based parallel co-processor is comprised of up to 16 hardware threads that can efficiently utilize the vector processor and is required by automotive microcontrollers targetting safety-critical systems. It can be used for model predictive control, AI inference, sensor processing, and more.

Samples of the RH850/U2B MCU are expected by Q2 2022. More details can be found on the press release and product page.

Thanks to TLS for the tip.

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2 Replies to “Renesas RH850/U2B automotive SoC features RISC-V-based parallel co-processor”

  1. Wow. There’s nothing else I can say about it. Wow.
    Yeah, probably the most powerful asil-d platform I’ve ever seen.

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