Renesas R7FA2E2A34CNK#HA0

Overview

R7FA2E2A34CNK#HA0 from Renesas Electronics is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 16-KB code flash, 8-KB SRAM, 12-bit ADC and DAC, integrated CAN interface, and hardware security including AES-128/256 and TRNG. It targets battery-powered industrial sensors and smart metering endpoints requiring functional safety support and extended temperature operation.

For engineers reviewing the R7FA2E2A34CNK#HA0 datasheet, R7FA2E2A34CNK#HA0 pinout, R7FA2E2A34CNK#HA0 application, or R7FA2E2A34CNK#HA0 equivalent, key selection criteria include its -40°C to +125°C operating range, HWQFN-24 package with 19 I/O pins (2 × 5-V tolerant), dual watchdog timers (WDT/IWDT), ECC-protected SRAM, and integrated CAC for clock accuracy monitoring in safety-critical timing loops.

Technical Context

The R7FA2E2A34CNK#HA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting 8 regions, enabling secure partitioning of firmware and data. Its system-level peripherals include Event Link Controller (ELC) for CPU-free peripheral chaining and Data Transfer Controller (DTC) for autonomous memory transfers triggered by interrupts.

It integrates a full CAN 2.0B module compliant with ISO 11898-1, alongside SCI (UART/SPI/I²C-compatible), I3C, and SPI interfaces - all configurable via register-based mode selection without external logic. Analog subsystem includes ADC12 with 4-channel input multiplexing, on-die temperature sensor, and low-power analog comparators with selectable speed/current trade-offs.

Key Specifications

Pinout & Package

Package: HWQFN-24 (4 mm × 4 mm, 0.5 mm pitch), exposed die pad recommended to connect to VSS. Pin count: 24, with 19 general-purpose I/Os (2 × 5-V tolerant), 3 power/ground pins (VCC, VSS, VCL), and dedicated debug (SWDIO/SWCLK), reset (RES), and mode (MD) pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A34CNK#HA0, the R7FA2E1A34CNK#HA0 reduces system cost by omitting CAN and trimming I/O count, while the R7FA2E2A74CNK#HA0 extends memory and analog resources for complex edge processing - both share identical low-power architecture and safety features.

Availability

R7FA2E2A34CNK#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, motor-controlled actuators, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E2A34CNK#HA0 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RA2E2 Group is designed for ultra-low-power, cost-sensitive embedded applications demanding functional safety, security, and extended temperature operation - targeting industrial automation, smart meters, and battery-powered edge devices.

FAQ

What is the maximum operating frequency of the R7FA2E2A34CNK#HA0?

The R7FA2E2A34CNK#HA0 operates at a maximum frequency of 48 MHz using the Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) configured at 48 MHz or via external crystal sources. The MCU maintains full peripheral functionality-including CAN, ADC, and PWM-at this frequency, and supports dynamic clock scaling to reduce power during idle periods.

Does the R7FA2E2A34CNK#HA0 support CAN communication?

Yes, the R7FA2E2A34CNK#HA0 integrates a full CAN 2.0B controller compliant with ISO 11898-1. It supports bit rates up to 1 Mbps, message filtering, FIFO buffering, and loopback self-test mode. The CAN module operates independently of the CPU via dedicated interrupt vectors and is fully functional across the device's -40°C to +125°C temperature range.

What package type and pin count does the R7FA2E2A34CNK#HA0 use?

The R7FA2E2A34CNK#HA0 uses a 24-pin HWQFN package (4 mm × 4 mm, 0.5 mm pitch) with an exposed die pad. It provides 19 general-purpose I/O pins, including two 5-V tolerant ports (P400 and P401), and dedicated pins for SWD debug, reset, mode control, and analog reference.

How much flash and SRAM memory does the R7FA2E2A34CNK#HA0 include?

The R7FA2E2A34CNK#HA0 includes 16 KB of code flash memory (with 100,000 program/erase cycles), 2 KB of data flash memory, and 8 KB of on-chip SRAM. The SRAM incorporates ECC and parity error checking to detect and correct single-bit errors, supporting functional safety requirements in mission-critical applications.

What security features are implemented in the R7FA2E2A34CNK#HA0?

The R7FA2E2A34CNK#HA0 implements AES-128/256 hardware acceleration, a True Random Number Generator (TRNG), Clock Frequency Accuracy Measurement Circuit (CAC), register write protection (PRCR), illegal memory access detection, and Arm TrustZone-enabled secure execution. These features collectively support secure boot, encrypted firmware updates, and tamper-resistant data storage in industrial and utility applications.