Renesas R7FA2E1A92DDA#HC0

Overview

R7FA2E1A92DDA 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 touch sensing (CTSU2), and integrated security (AES128/256, TRNG). It targets battery-powered HMI, sensor nodes, and industrial control where low power, secure firmware execution, and analog integration are critical.

For engineers reviewing the R7FA2E1A92DDA datasheet, R7FA2E1A92DDA pinout, R7FA2E1A92DDA application, or R7FA2E1A92DDA equivalent, key selection criteria include its 25-pin WLCSP package, -40°C to +85°C industrial temperature grade, 1.6–5.5 V supply range, CTSU2-based touch interface support, and dual watchdog timers (WDT/IWDT) for functional safety-critical firmware monitoring.

Technical Context

The R7FA2E1A92DDA implements the Armv8-M architecture with Memory Protection Unit (MPU) and CoreSight™ debug infrastructure, enabling secure, scalable embedded firmware. Its clock system integrates multiple oscillators (HOCO/MOCO/LOCO/SOSC) with CAC for real-time frequency accuracy validation.

Analog subsystem includes ADC12 with 8 input channels, two low-power comparators (ACMPLP), and on-die temperature sensor (TSN); digital peripherals comprise four SCI interfaces (UART/IIC/SPI/Smart Card), one dedicated I2C, one SPI, RTC, ELC, DTC, and AGT timers - all optimized for event-driven, low-active-power operation in compact form factors.

Key Specifications

Pinout & Package

Package: 25-pin Wafer-Level Chip Scale Package (WLCSP), 2.14 mm × 2.27 mm, 0.4 mm pitch, exposed die 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 R7FA2E1A93CDA, R7FA2E1A92DDA trades extended temperature rating for lower cost in standard industrial environments; versus R7FA2E1A72DDA, it doubles flash capacity for RTOS-based firmware or field-upgradable feature sets without changing PCB layout.

Availability

R7FA2E1A92DDA is available at Aetrix Electronics and suitable for smart home sensor nodes, wearable health monitors, industrial control panels, and asset tracking tags requiring stable component supply across high-mix, low-volume production runs.

Supply support for R7FA2E1A92DDA 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 security, analog integration, and compact packaging - exemplified by the R7FA2E1A92DDA's WLCSP form factor and CTSU2-based HMI capability.

FAQ

What is the maximum operating frequency of the R7FA2E1A92DDA?

The R7FA2E1A92DDA features an Arm Cortex-M23 core with a maximum operating frequency of 48 MHz. This speed is achievable across its full 1.6–5.5 V supply range and -40°C to +85°C temperature grade, supported by the high-speed on-chip oscillator (HOCO) or external crystal sources. The R7FA2E1A92DDA maintains timing compliance under worst-case voltage and temperature conditions per its datasheet specifications.

Does the R7FA2E1A92DDA support hardware-accelerated cryptography?

Yes, the R7FA2E1A92DDA integrates dedicated hardware for AES128 and AES256 encryption/decryption, plus a True Random Number Generator (TRNG). These modules operate independently of the CPU, enabling secure boot, encrypted firmware updates, and TLS handshake acceleration without degrading real-time performance. The R7FA2E1A92DDA's TRNG meets NIST SP 800-90B entropy requirements for cryptographic key generation.

How many analog input channels does the ADC12 support on the R7FA2E1A92DDA?

The R7FA2E1A92DDA's 12-bit ADC12 supports 8 analog input channels (AN000–AN007, AN017–AN022 per datasheet Table 1.14). This count is specific to the 25-pin WLCSP variant (R7FA2E1A92DDA); larger packages offer up to 13 channels. Inputs include internal references (VREFH0/VREFL0), temperature sensor output, and selectable gain options for direct sensor interfacing.

What is the package type and pin count of the R7FA2E1A92DDA?

The R7FA2E1A92DDA uses a 25-pin Wafer-Level Chip Scale Package (WLCSP) with dimensions 2.14 mm × 2.27 mm and 0.4 mm pitch. It includes 20 general-purpose I/O pins (14 N-ch open-drain capable), 3 5-V tolerant inputs, and dedicated pins for power, debug (SWDIO/SWCLK), crystal, and capacitive touch (TSxx). The exposed die pad is recommended to connect to VSS for thermal and electrical stability.

Does the R7FA2E1A92DDA include a real-time clock (RTC)?

Yes, the R7FA2E1A92DDA integrates a full-featured Realtime Clock (RTC) supporting both calendar count mode (2000–2099, leap-year aware) and binary count mode. It operates from the 32.768 kHz sub-clock oscillator (SOSC) or LOCO, retains time in Deep Sleep mode with sub-μA current, and provides 1-Hz or 64-Hz output on RTCOUT. The RTC is accessible via dedicated registers and supports alarm and periodic interrupt functions essential for time-stamped logging and scheduled wake-up.