Renesas R7FA2E1A52DFL#AA0

Overview

R7FA2E1A52DFL#AA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 32-KB code flash memory, 16-KB SRAM, a 12-bit ADC (ADC12), Capacitive Sensing Unit (CTSU2), and integrated security functions including AES128/256 and TRNG. It targets battery-powered HMI, sensor nodes, and industrial control systems requiring robust safety features and low-voltage operation down to 1.6 V.

For engineers reviewing the R7FA2E1A52DFL#AA0 datasheet, R7FA2E1A52DFL#AA0 pinout, R7FA2E1A52DFL#AA0 application, or R7FA2E1A52DFL#AA0 equivalent, key selection criteria include its 48-pin LQFP package with 37 I/O pins, -40°C to +85°C industrial temperature grade, CTSU2-based touch interface support, and dual watchdog timers (WDT/IWDT) for functional safety compliance.

Technical Context

The R7FA2E1A52DFL#AA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) and CoreSight™ debug infrastructure, enabling secure, scalable firmware deployment in resource-constrained embedded systems. Its clock system integrates multiple on-chip oscillators (HOCO/MOCO/LOCO) plus external crystal support, with Clock Frequency Accuracy Measurement Circuit (CAC) for real-time oscillator calibration.

System-level integration includes Event Link Controller (ELC) for CPU-free peripheral triggering, Data Transfer Controller (DTC) for autonomous data movement, and Safety features such as SRAM parity checking, flash area protection, ADC self-diagnosis, and register write protection - all aligned with IEC 61508 SIL-2 readiness requirements.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), industrial-grade (-40°C to +85°C), Pb-free Sn terminal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A52DFL#AA0, the R7FA2E1A52DNE#AA0 offers superior thermal management in a denser package, while R7FA2E1A53CFL#AA0 adds extended temperature capability and SOSC support - both retain identical firmware compatibility and peripheral feature set.

Availability

R7FA2E1A52DFL#AA0 is available at Aetrix Electronics and suitable for smart home thermostats, industrial sensor nodes, medical wearables, appliance control panels, and battery-powered HMI applications requiring stable component supply and long-term manufacturability.

Supply support for R7FA2E1A52DFL#AA0 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with over 40 years of microcontroller innovation.

The RA2E1 Group, including R7FA2E1A52DFL#AA0, was designed specifically for cost-sensitive, ultra-low-power applications demanding robust security, functional safety, and human-machine interface capabilities - targeting battery-operated edge devices.

FAQ

What is the maximum operating frequency of the R7FA2E1A52DFL#AA0?

The R7FA2E1A52DFL#AA0 operates at a maximum frequency of 48 MHz using its Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) or external crystal sources, and is supported across its full industrial temperature range (-40°C to +85°C). The MCU maintains timing integrity through its Clock Frequency Accuracy Measurement Circuit (CAC), which validates oscillator stability in real time.

Does the R7FA2E1A52DFL#AA0 support capacitive touch sensing?

Yes, the R7FA2E1A52DFL#AA0 integrates the Capacitive Sensing Unit version 2 (CTSU2), supporting up to 20 touch channels. It enables robust self-capacitance and mutual-capacitance sensing with built-in noise cancellation, auto-calibration, and proximity detection - allowing direct implementation of touch buttons, sliders, and wheels without external components. The R7FA2E1A52DFL#AA0's CTSU2 is fully configurable via registers and supported by Renesas' Smart Configurator tool.

What security features are included in the R7FA2E1A52DFL#AA0?

The R7FA2E1A52DFL#AA0 includes AES128/256 hardware acceleration, True Random Number Generator (TRNG), Cyclic Redundancy Check (CRC) calculator, Data Operation Circuit (DOC), Memory Protection Unit (MPU), and register write protection. These features collectively support secure boot, encrypted firmware updates, tamper-resistant key storage, and runtime data integrity checks - meeting foundational requirements for PSA Level 1 and IEC 62443-4-2 compliance. All security blocks are accessible via standard CMSIS drivers.

What is the operating voltage range for the R7FA2E1A52DFL#AA0?

The R7FA2E1A52DFL#AA0 operates from 1.6 V to 5.5 V on its main VCC supply, enabling direct compatibility with single-cell Li-ion, Li-SOCl₂, alkaline, and USB-powered systems. Its wide voltage range is maintained across the full -40°C to +85°C temperature specification, and internal regulators ensure stable core and analog domain operation regardless of input rail variation. Low Voltage Detection (LVD) modules (LVD0/LVD1/LVD2) provide programmable brown-out thresholds for graceful shutdown.

How many I/O pins does the R7FA2E1A52DFL#AA0 have in its 48-pin LQFP package?

The R7FA2E1A52DFL#AA0 in the 48-pin LQFP package provides 37 general-purpose I/O pins, plus 3 dedicated input-only pins and 3 pins with 5-V tolerance. It also includes 26 N-channel open-drain output capable pins, supporting mixed-voltage interfacing and LED driving without external transistors. Pin configuration is fully software-controllable via the GPIO module, with individual pull-up enable and drive strength selection.