Renesas R7F701275EABG-C#HC6

Overview

R7F701275EABG-C#HC6 from Renesas Electronics is a 32-bit RH850/C1M-A1 automotive microcontroller featuring dual-core lockstep CPU architecture, 2 MB on-chip flash memory, 256 KB RAM, and integrated CAN FD, LIN, and SENT interfaces. It operates at up to 120 MHz, supports ASIL-D functional safety per ISO 26262, and targets engine control units (ECUs) requiring high-integrity real-time processing.

For engineers reviewing the R7F701275EABG-C#HC6 datasheet, R7F701275EABG-C#HC6 pinout, R7F701275EABG-C#HC6 application, or R7F701275EABG-C#HC6 equivalent, key selection criteria include dual-core lockstep execution, ASIL-D hardware safety mechanisms (PE guard, checker core, ECC on flash/RAM), CAN FD data rate up to 5 Mbps, and 176-pin LQFP package with automotive-grade AEC-Q100 Grade 1 qualification.

Technical Context

The R7F701275EABG-C#HC6 implements two tightly coupled RH850 G3KH CPU cores operating in lockstep mode with cycle-by-cycle comparison and error detection. It integrates a dedicated Safety Support Core (SSC) for independent monitoring of CPU behavior, memory integrity, and peripheral operation.

Hardware safety features include ECC protection on both instruction and data SRAM, flash memory with built-in read-after-write verification and background CRC checking, and redundant clock domain monitoring with fail-safe reset generation. The device supports full ISO 26262 ASIL-D decomposition across CPU, memory, and peripheral subsystems.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F701275EABG-C#HC6, the R7F701274EABG-C#HC6 offers cost reduction through memory downscaling without sacrificing lockstep safety, while the R7F701285EABG-C#HC6 adds Ethernet capability at the expense of higher power and BOM cost - neither is pin-compatible, but all three share identical peripheral register mapping and safety architecture.

Availability

R7F701275EABG-C#HC6 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and brake control units requiring stable component supply across automotive production lifecycles.

Supply support for R7F701275EABG-C#HC6 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 leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RH850 family was designed specifically for ASIL-D automotive applications, emphasizing hardware-based functional safety, real-time determinism, and robustness in harsh environments - the R7F701275EABG-C#HC6 exemplifies this mission with its lockstep dual-core and integrated safety monitors.

FAQ

What is the maximum operating frequency of the R7F701275EABG-C#HC6?

The R7F701275EABG-C#HC6 operates at a maximum core frequency of 120 MHz, achieved via an on-chip PLL with external 4–20 MHz crystal input. This frequency is sustained across the full −40 °C to +125 °C temperature range under AEC-Q100 Grade 1 conditions. All timing-critical peripherals - including CAN FD, SENT, and PWM - are synchronized to this clock domain, ensuring deterministic latency for safety-critical control loops. The R7F701275EABG-C#HC6 maintains this performance without derating in automotive under-hood environments.

Does the R7F701275EABG-C#HC6 support ISO 26262 ASIL-D compliance out of the box?

The R7F701275EABG-C#HC6 provides the hardware foundation for ISO 26262 ASIL-D compliance, including dual-core lockstep execution, PE Guard, Checker Core, ECC on flash and SRAM, and redundant clock monitoring. However, full ASIL-D certification requires integration into a validated safety concept, proper configuration of safety mechanisms, and qualification of the software stack per ISO 26262 Part 6. The R7F701275EABG-C#HC6 itself is not certified as a standalone item but is qualified as an ASIL-D-ready component per Renesas' safety manual and FMEDA reports.

What package type and pin count does the R7F701275EABG-C#HC6 use?

The R7F701275EABG-C#HC6 uses a 176-pin LQFP package measuring 24 mm × 24 mm with 0.5 mm pitch. This package is RoHS-compliant and rated MSL 3, making it suitable for standard automotive PCB assembly processes. Pin assignments match the RH850/C1M-A1 family specification, enabling drop-in compatibility with other members of the same pinout group - though electrical and memory differences require firmware validation. The R7F701275EABG-C#HC6 does not use BGA or QFN variants.

Which communication interfaces are integrated into the R7F701275EABG-C#HC6?

The R7F701275EABG-C#HC6 integrates CAN FD (supporting up to 5 Mbps data phase), three LIN channels, four SENT interfaces, and multiple SPI/I²C/UART peripherals. It lacks Ethernet or FlexRay controllers. CAN FD is implemented with hardware message buffering and filtering, while SENT supports both input (sensor decoding) and output (actuator command) modes with built-in CRC and timing validation per SAE J2716 rev 2015. All interfaces operate within the ASIL-D safety framework and can be monitored by the Safety Support Core. The R7F701275EABG-C#HC6 does not include USB or PCIe.

What is the flash memory capacity and safety mechanism of the R7F701275EABG-C#HC6?

The R7F701275EABG-C#HC6 contains 2 MB of on-chip code flash memory with end-to-end ECC protection (SEC-DED), background CRC scanning, and read-after-write verification. Flash sectors support erase/write cycles ≥ 100,000 and data retention ≥ 20 years at 125 °C. These mechanisms are hardware-enforced and continuously monitored by the Safety Support Core to detect and report latent faults - critical for ASIL-D applications where uncorrectable flash errors must be contained before affecting control outputs. The R7F701275EABG-C#HC6 flash is not field-upgradable via JTAG alone; secure bootloader support is required for OTA updates.