Renesas R7FA2E1A72DFJ#AA0

Overview

R7FA2E1A72DFJ#AA0 from Renesas Electronics is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 64-KB code flash, 16-KB SRAM, a 12-bit ADC, Capacitive Sensing Unit (CTSU2), and integrated security functions including AES128/256 and TRNG. It targets battery-powered HMI, sensor nodes, and industrial control applications requiring robust safety and low-voltage operation (1.6–5.5 V).

For engineers reviewing the R7FA2E1A72DFJ#AA0 datasheet, R7FA2E1A72DFJ#AA0 pinout, R7FA2E1A72DFJ#AA0 application, or R7FA2E1A72DFJ#AA0 equivalent, key selection criteria include its 32-pin LQFP package with 23 GPIOs, -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 R7FA2E1A72DFJ#AA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling secure partitioning of firmware and data. 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.

Peripheral integration includes four Serial Communications Interfaces (SCI) supporting UART, SPI, I²C, and smart card modes; one dedicated I²C bus interface; one SPI channel; two low-power analog comparators (ACMPLP); and a Realtime Clock (RTC) with calendar mode and LOCO-only clock source - all optimized for deterministic low-power operation in resource-constrained edge devices.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), exposed pad recommended to be connected to VSS or left floating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A72DFJ#AA0, the R7FA2E1A72DFM#AA0 offers greater I/O scalability and richer analog resources but requires PCB redesign, while R7FA2E1A52DFJ#AA0 reduces flash capacity by 50% with identical pinout - enabling drop-in replacement only if firmware fits and no future updates demand more code space.

Availability

R7FA2E1A72DFJ#AA0 is available at Aetrix Electronics and suitable for smart home thermostats, industrial sensor nodes, medical wearables, and energy meter interfaces requiring stable component supply across long product lifecycles.

Supply support for R7FA2E1A72DFJ#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.

The RA2E1 Group is designed for ultra-low-power, cost-sensitive general-purpose applications, emphasizing energy efficiency, security, and rapid development through Arm-based software compatibility and flexible peripheral integration.

FAQ

What is the maximum operating frequency of the R7FA2E1A72DFJ#AA0?

The R7FA2E1A72DFJ#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 sustained across the full industrial temperature range (-40°C to +85°C) and supply voltage (1.6–5.5 V). The R7FA2E1A72DFJ#AA0 maintains timing compliance per its datasheet specifications under these conditions.

Does the R7FA2E1A72DFJ#AA0 support capacitive touch sensing?

Yes, the R7FA2E1A72DFJ#AA0 integrates the Capacitive Sensing Unit version 2 (CTSU2), supporting up to 11 touch channels (e.g., TS00, TS02–TS07, TS17, TS18, TS21–TS25). It includes hardware-based noise cancellation, auto-calibration, and drift compensation - enabling reliable touch button, slider, or proximity detection in consumer and industrial HMI applications without external components.

What security features are included in the R7FA2E1A72DFJ#AA0?

The R7FA2E1A72DFJ#AA0 includes AES128/256 encryption acceleration, a True Random Number Generator (TRNG), flash area protection, register write protection, SRAM parity checking, and independent watchdog timer (IWDT). These features support secure boot, encrypted communication, and functional safety requirements such as IEC 61508. The R7FA2E1A72DFJ#AA0 implements them in hardware to minimize software overhead and attack surface.

What is the pin count and package type of the R7FA2E1A72DFJ#AA0?

The R7FA2E1A72DFJ#AA0 uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch), designated by the "FJ" suffix in its part number. It provides 23 general-purpose I/O pins, three 5-V tolerant inputs, and dedicated debug (SWDIO/SWCLK), reset (RES), and oscillator (XTAL/EXTAL/XCIN/XCOUT) pins - matching industry-standard footprints for ease of layout and manufacturing.

How does the R7FA2E1A72DFJ#AA0 handle low-power operation?

The R7FA2E1A72DFJ#AA0 supports multiple low-power modes including Sleep, Deep Sleep, and Software Standby, with typical deep-sleep current below 1 μA when RTC is active. Its power management leverages the Event Link Controller (ELC) and Data Transfer Controller (DTC) to offload tasks from the CPU, and integrates low-power peripherals like AGT timers and CTSU2 that operate autonomously - enabling extended battery life in always-on edge devices. The R7FA2E1A72DFJ#AA0 achieves this without sacrificing real-time responsiveness or safety monitoring capability.