Renesas R7F701422EAFB-C#BA1

Overview

R7F701422EAFB-C#BA1 from Renesas Electronics is a 32-bit RH850/D1M1 automotive-grade microcontroller featuring a dual-core lockstep CPU, 2 MB on-chip flash memory, 256 KB RAM, and integrated CAN FD, LIN, and Ethernet AVB interfaces. It supports ASIL-D functional safety compliance per ISO 26262 and operates at up to 160 MHz. This MCU targets high-integrity powertrain and chassis control units in modern vehicles.

For engineers reviewing the R7F701422EAFB-C#BA1 datasheet, R7F701422EAFB-C#BA1 pinout, R7F701422EAFB-C#BA1 application, or R7F701422EAFB-C#BA1 equivalent, key selection criteria include dual-core lockstep execution, ASIL-D hardware safety mechanisms (ECC on flash/RAM, BIST, error-correcting code), CAN FD bandwidth (5 Mbps), and AEC-Q100 Grade 1 qualification for -40°C to +125°C operation.

Technical Context

The R7F701422EAFB-C#BA1 implements two synchronized RH850 G3K CPU cores executing identical instructions with cycle-accurate comparison and fault detection logic. Its safety architecture includes dedicated Safety Management Unit (SMU), memory built-in self-test (MBIST), and lockstep monitor circuitry that triggers safe state entry upon mismatch detection.

It integrates a 12-bit ADC with 48 channels, 4x 32-bit general-purpose timers, 2x CAN FD controllers with time-triggered communication support, and an Ethernet AVB controller compliant with IEEE 802.1AS and 802.1Qav standards - all accessible via AXI/AHB bus matrix with configurable priority arbitration.

Key Specifications

Pinout & Package

Package: 176-pin LQFP (24 mm × 24 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive safety microcontroller applications.

Compared with R7F701422EAFB-C#BA1, the R7F701422EAFB-C#AA1 offers identical safety architecture at lower thermal grade, while the TC397XP requires external components to match R7F701422EAFB-C#BA1's integrated Ethernet AVB and time-synchronization capabilities.

Availability

R7F701422EAFB-C#BA1 is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire, and ADAS domain controller designs requiring stable component supply and long-term automotive lifecycle support.

Supply support for R7F701422EAFB-C#BA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RH850/D1M1 product line was designed specifically for ASIL-D automotive safety applications, integrating hardware safety mechanisms, lockstep CPU architecture, and automotive-qualified peripherals to simplify ISO 26262 certification.

FAQ

What is the maximum operating frequency of the R7F701422EAFB-C#BA1?

The R7F701422EAFB-C#BA1 operates at a maximum frequency of 160 MHz. This clock speed is achieved using the on-chip PLL with an external 1–20 MHz crystal or oscillator input. The dual-core lockstep architecture maintains strict timing determinism at this frequency, enabling hard real-time control loops required in powertrain and chassis applications. All peripherals-including CAN FD, Ethernet AVB, and ADC-are fully synchronized to this system clock domain.

Does the R7F701422EAFB-C#BA1 support ISO 26262 ASIL-D compliance out of the box?

The R7F701422EAFB-C#BA1 is ASIL-D ready with integrated hardware safety features including dual-core lockstep execution, Safety Management Unit (SMU), memory BIST, ECC on flash and RAM, and lockstep monitor circuitry. While the silicon provides the necessary safety mechanisms, full ASIL-D compliance requires proper configuration of these features, integration into a certified safety framework, and validation per ISO 26262 Part 5 and Part 6. Renesas supplies safety manuals and FMEDA reports to support this process for the R7F701422EAFB-C#BA1.

What communication interfaces are integrated into the R7F701422EAFB-C#BA1?

The R7F701422EAFB-C#BA1 integrates two CAN FD controllers (up to 5 Mbps), one LIN controller, one Ethernet AVB controller compliant with IEEE 802.1AS and 802.1Qav, six SPI interfaces, four I²C buses, and three UART/SCI modules. All interfaces support hardware-based time stamping and error recovery. The Ethernet AVB controller includes integrated MAC and supports time-synchronized audio/video streaming without external PHY configuration overhead.

What package type and pin count does the R7F701422EAFB-C#BA1 use?

The R7F701422EAFB-C#BA1 uses a 176-pin LQFP package measuring 24 mm × 24 mm with 0.5 mm pitch. This RoHS-compliant package meets AEC-Q100 Grade 1 requirements and supports standard surface-mount assembly processes. Pin assignments include dedicated power domains (VDD/VDDIO), dual CAN FD transceiver pins, Ethernet MII/MDIO signals, and JTAG/SWD debug interface - all documented in Renesas' official pin function table for the R7F701422EAFB-C#BA1.

How is flash memory protected against unauthorized access on the R7F701422EAFB-C#BA1?

The R7F701422EAFB-C#BA1 implements multi-layer flash protection including read-out protection (ROP), write protection (WPROT), and secure boot ROM with cryptographic signature verification. Access to flash is controlled via the Flash Control Unit (FCU), which enforces zone-based permissions and prevents runtime modification of protected sectors. These mechanisms are configurable during programming and persist across power cycles, ensuring firmware integrity and IP protection for automotive software deployed on the R7F701422EAFB-C#BA1.