Renesas R7F7016843AFP-C#AA1

Overview

R7F7016843AFP-C#AA1 from Renesas Electronics is a 32-bit RH850/F1KH-D8 automotive microcontroller featuring dual-core lockstep CPU architecture, 4 MB on-chip flash memory, and integrated ASIL-B compliant safety mechanisms for powertrain and chassis control applications. It operates at up to 160 MHz, supports CAN FD (up to 5 Mbps), and includes hardware-based ECC for flash and SRAM.

For engineers reviewing the R7F7016843AFP-C#AA1 datasheet, R7F7016843AFP-C#AA1 pinout, R7F7016843AFP-C#AA1 application, or R7F7016843AFP-C#AA1 equivalent, key selection considerations include ASIL-B functional safety certification, dual-core lockstep execution integrity, CAN FD interface timing compliance, and RH850/F1KH-D8-specific peripheral register mapping in the Hardware User's Manual Rev.1.30.

Technical Context

The R7F7016843AFP-C#AA1 implements a dual-core RH850 G3KH CPU with lockstep monitoring logic that continuously compares instruction execution between cores and triggers a safety interrupt on mismatch. Its memory subsystem includes 4 MB of flash with 128-bit wide access, 512 KB of SRAM with ECC, and 64 KB of TCM (Tightly Coupled Memory) for deterministic real-time code execution.

Peripheral integration includes 4x CAN FD controllers with time-triggered communication support, 2x 12-bit ADCs (16-channel each), 32-channel GPT (General PWM Timer), and an intelligent cryptographic unit (ICUMD) supporting AES-128/256, SHA-256, and RSA-2048 acceleration - all accessible via dedicated bus arbitration to minimize CPU load.

Key Specifications

Pinout & Package

This device is housed in a 176-pin LQFP package (24 mm × 24 mm, 0.5 mm pitch) with dedicated VDD/VSS pairs per power domain, separate analog/digital ground planes, and reinforced I/O drive strength for automotive EMI resilience.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F7016823AFP-C#AA1, the R7F7016843AFP-C#AA1 provides double flash capacity and integrated cryptographic acceleration essential for secure OTA updates; versus R7F7016943AFP-C#AA1, it offers optimal balance of ASIL-B safety, CAN FD bandwidth, and cost for mid-tier powertrain ECUs without requiring RSA-4096 or fifth CAN FD channel.

Availability

R7F7016843AFP-C#AA1 is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, and brake-by-wire modules requiring stable component supply across extended automotive production lifecycles.

Supply support for R7F7016843AFP-C#AA1 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.

The RH850/F1KH-D8 product line - including R7F7016843AFP-C#AA1 - was designed specifically for ASIL-B automotive powertrain and chassis control applications requiring high computational throughput, functional safety compliance, and robust real-time peripheral integration.

FAQ

What safety certifications does the R7F7016843AFP-C#AA1 support?

The R7F7016843AFP-C#AA1 is designed to meet ASIL-B requirements per ISO 26262-5:2018. It includes hardware lockstep monitoring, memory BIST, ECC-protected flash and SRAM, and dedicated safety registers accessible only in privileged mode. Renesas provides FMEDA reports and safety manuals confirming its suitability for ASIL-B applications such as engine control and EPS. The R7F7016843AFP-C#AA1 itself is not pre-certified, but its architecture and documentation enable customer-led ASIL-B integration.

Does the R7F7016843AFP-C#AA1 support CAN FD with ISO 11898-1:2015 compliance?

Yes, the R7F7016843AFP-C#AA1 integrates four fully compliant CAN FD controllers supporting data rates up to 5 Mbps in the data phase and 1 Mbps in the arbitration phase, meeting ISO 11898-1:2015. Each controller includes hardware timestamping, flexible data length (up to 64 bytes), and automatic bit-rate switching. The R7F7016843AFP-C#AA1 also supports time-triggered communication scheduling via its GPT and interrupt controller for deterministic network behavior.

What is the maximum operating temperature range for the R7F7016843AFP-C#AA1?

The R7F7016843AFP-C#AA1 is rated for operation from −40 °C to +125 °C ambient temperature, qualified per AEC-Q100 Grade 1 standards. This range covers under-hood automotive environments where thermal cycling and sustained high temperatures are common. The device includes on-chip temperature sensors and thermal shutdown logic that triggers at 150 °C junction temperature, protecting the R7F7016843AFP-C#AA1 during transient overload conditions.

How does the R7F7016843AFP-C#AA1 handle firmware updates securely?

The R7F7016843AFP-C#AA1 uses its integrated ICUMD (Intelligent Cryptographic Unit – Master D) to accelerate AES-128 decryption and SHA-256 signature verification during firmware update. Secure boot validates the digital signature of the new image before execution, and flash write protection prevents unauthorized modification. The R7F7016843AFP-C#AA1 supports A/B swap update schemes using its 4 MB flash, ensuring zero-downtime field upgrades while maintaining ASIL-B integrity throughout the process.

Is the R7F7016843AFP-C#AA1 pin-compatible with other RH850/F1KH-D8 variants?

Yes, the R7F7016843AFP-C#AA1 shares identical 176-pin LQFP packaging and pin assignment with all RH850/F1KH-D8 family members, including R7F7016823AFP-C#AA1 and R7F7016943AFP-C#AA1. Pin functions, power domains, and peripheral mappings are consistent across the family. This allows direct PCB reuse when scaling flash capacity or cryptographic features - the R7F7016843AFP-C#AA1 can be substituted without layout changes if the target application fits within its 4 MB flash and standard ICUMD feature set.