Renesas R7FA2E1A92DNH#AA0

Overview

R7FA2E1A92DNH#AA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 128-KB code flash, 16-KB SRAM, a 12-bit ADC, Capacitive Sensing Unit (CTSU2), and integrated security (AES128/256, TRNG). It targets battery-powered HMI, sensor nodes, and industrial control where low power, touch interface, and functional safety are critical.

For engineers reviewing the R7FA2E1A92DNH#AA0 datasheet, R7FA2E1A92DNH#AA0 pinout, R7FA2E1A92DNH#AA0 application, or R7FA2E1A92DNH#AA0 equivalent, this page delivers verified specifications, package mapping to 32-pin HWQFN (5 mm × 5 mm, 0.5 mm pitch), confirmed I/O count (23 pins), real-time clock support, and two validated alternative MCUs for cost- or feature-driven design trade-offs.

Technical Context

The R7FA2E1A92DNH#AA0 implements the Armv8-M architecture with Memory Protection Unit (8 regions) and CoreSight™ MTB-M23 trace, enabling secure, scalable embedded firmware. Its system-level timing relies on multiple independent clocks: HOCO (48 MHz), SOSC (32.768 kHz), and IWDT-dedicated 15-kHz oscillator - supporting precise RTC operation and fail-safe watchdog recovery.

Peripheral integration centers on event-driven autonomy: Event Link Controller (ELC) enables direct hardware-to-hardware triggering between modules (e.g., ADC conversion start → DTC transfer), while Data Transfer Controller (DTC) offloads CPU during memory-mapped transfers. Safety is enforced via SRAM parity checking, flash area protection, and CAC-based clock accuracy monitoring.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5 mm × 5 mm, 0.5 mm pitch), exposed thermal pad recommended to connect to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A92DNH#AA0, the R7FA2E1A92DFJ#AA0 offers identical functionality in a more serviceable LQFP package, while R7FA2E1A72DNH#AA0 reduces flash capacity by 50% to lower unit cost - both retain full pin compatibility and software portability within the RA2E1 family.

Availability

R7FA2E1A92DNH#AA0 is available at Aetrix Electronics and suitable for smart home thermostats, industrial sensor nodes, and medical wearable patches requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R7FA2E1A92DNH#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RA2E1 group is designed for ultra-low-power, cost-sensitive embedded applications demanding capacitive touch, security, and functional safety - targeting battery-operated HMI and sensor edge nodes.

FAQ

What is the maximum operating frequency of the R7FA2E1A92DNH#AA0?

The R7FA2E1A92DNH#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 an external crystal up to 20 MHz multiplied via PLL. The device maintains full peripheral functionality-including ADC sampling, CTSU2 scanning, and SCI communication-at this clock rate, as verified in the R01DS0386EJ0170 datasheet Section 1.1.

Does the R7FA2E1A92DNH#AA0 support capacitive touch sensing?

Yes, the R7FA2E1A92DNH#AA0 integrates the Capacitive Sensing Unit version 2 (CTSU2), supporting up to 11 touch pins in its 32-pin HWQFN package. It provides self-capacitance measurement with built-in noise cancellation, automatic drift compensation, and low-power scan modes - enabling robust touch button, slider, and proximity detection without external components, as specified in Table 1.13 and Section 1.9 of the R7FA2E1A92DNH#AA0 datasheet.

What package type is used for the R7FA2E1A92DNH#AA0?

The R7FA2E1A92DNH#AA0 uses a 32-pin HWQFN package measuring 5 mm × 5 mm with 0.5 mm pitch and an exposed thermal pad. This is confirmed by the part numbering scheme ('NH' suffix = HWQFN 32-pin) in Figure 1.2 and the pin assignment diagram in Figure 1.7 of the R01DS0386EJ0170 datasheet. The thermal pad is recommended to be connected to VSS for optimal thermal performance.

How much flash and RAM does the R7FA2E1A92DNH#AA0 include?

The R7FA2E1A92DNH#AA0 includes 128 KB of code flash memory, 4 KB of data flash memory, and 16 KB of SRAM with parity protection. These values are explicitly listed in Table 1.12 (Product List) and Section 1.1 (Function Outline) of the R01DS0386EJ0170 datasheet, and apply identically across all RA2E1 variants with '9' in the flash size digit - including R7FA2E1A92DNH#AA0.

Does the R7FA2E1A92DNH#AA0 support hardware encryption?

Yes, the R7FA2E1A92DNH#AA0 integrates dedicated AES128 and AES256 encryption engines plus a True Random Number Generator (TRNG). These modules are accessible via the RA SDK and enable secure boot, firmware signature verification, and encrypted data storage - meeting foundational requirements for IoT device security as documented in Section 1.1 (Security and Encryption) and Table 1.13 of the R01DS0386EJ0170 datasheet.