Renesas R7FA2E2A32DNJ#AA1

Overview

R7FA2E2A32DNJ#AA1 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 AES128/256 and TRNG. It targets battery-powered industrial sensors and smart metering endpoints requiring functional safety support and extended temperature operation.

For engineers reviewing the R7FA2E2A32DNJ#AA1 datasheet, R7FA2E2A32DNJ#AA1 pinout, R7FA2E2A32DNJ#AA1 application, or R7FA2E2A32DNJ#AA1 equivalent, key selection criteria include its 20-pin HWQFN package, -40°C to +85°C industrial temperature grade, 16 KB flash capacity, CAN/I3C/SPI connectivity, and built-in ECC-SRAM with CAC clock accuracy monitoring.

Technical Context

The R7FA2E2A32DNJ#AA1 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling secure partitioning of firmware and data. Its system-level timing relies on multiple independent oscillators - HOCO (48 MHz), MOCO (8 MHz), LOCO (32.768 kHz), and IWDT-dedicated 15 kHz oscillator - coordinated via the Clock Frequency Accuracy Measurement Circuit (CAC) for runtime clock validation.

Peripheral integration centers on low-power responsiveness: the Event Link Controller (ELC) enables direct hardware-triggered actions between modules without CPU intervention, while the Data Transfer Controller (DTC) handles memory transfers autonomously. Safety features include SRAM parity checking, flash area protection, ADC self-diagnosis, and Independent Watchdog Timer (IWDT) with dedicated clock source.

Key Specifications

Pinout & Package

Package: 20-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die 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 R7FA2E2A32DNJ#AA1, the R7FA2E2A32DNK#AA1 offers expanded I/O and analog resources in a larger package, while R7FA2E2A52DNJ#AA1 retains identical form factor and thermal specs but doubles flash for complex connectivity stacks - both require no schematic changes beyond footprint adaptation or memory mapping updates.

Availability

R7FA2E2A32DNJ#AA1 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, BLDC motor controllers, and factory automation I/O terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E2A32DNJ#AA1 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 applications.

The RA2E2 Group is designed specifically for cost-sensitive, ultra-low-power general-purpose microcontroller applications demanding robust security, functional safety, and seamless scalability within the RA family architecture.

FAQ

What is the maximum operating frequency of the R7FA2E2A32DNJ#AA1?

The R7FA2E2A32DNJ#AA1 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) configured at 48 MHz, and the device maintains full peripheral functionality-including CAN, ADC, and crypto acceleration-at this rate. The R7FA2E2A32DNJ#AA1 also supports lower-frequency clock sources like MOCO (8 MHz) and LOCO (32.768 kHz) for ultra-low-power sleep modes.

Does the R7FA2E2A32DNJ#AA1 support CAN communication?

Yes, the R7FA2E2A32DNJ#AA1 integrates a full CAN 2.0B compliant controller with message objects, FIFO buffering, and bit-rate configuration up to 1 Mbps. It supports both standard and extended frame formats and includes automatic retransmission, error confinement, and loopback self-test modes. The R7FA2E2A32DNJ#AA1 uses dedicated CAN TX/RX pins mapped to P109 and P110 in the 20-pin HWQFN package, enabling direct connection to industry-standard transceivers.

What security features are implemented in the R7FA2E2A32DNJ#AA1?

The R7FA2E2A32DNJ#AA1 includes AES128/256 hardware acceleration, True Random Number Generator (TRNG), register write protection, illegal memory access detection, and secure debug authentication. These features are integrated into the RA2E2's TrustZone-enabled architecture and support secure boot, encrypted firmware updates, and key management per IEC 62443-3-3. The R7FA2E2A32DNJ#AA1 does not include a dedicated secure element but provides foundational primitives for building certified secure subsystems.

What is the operating temperature range for the R7FA2E2A32DNJ#AA1?

The R7FA2E2A32DNJ#AA1 is rated for industrial operation from -40°C to +85°C, as indicated by the "2" in its part number suffix (R7FA2E2A32DNJ#AA1). This grade applies to both the 20-pin HWQFN (NJ) and 24-pin HWQFN (NK) variants. The device meets JEDEC JESD22-A104 reliability standards under these conditions and supports full specification compliance-including flash endurance, ADC linearity, and clock accuracy-across the entire range.

How much flash and SRAM memory does the R7FA2E2A32DNJ#AA1 have?

The R7FA2E2A32DNJ#AA1 contains 16 KB of code flash memory, 2 KB of data flash memory (rated for 100,000 program/erase cycles), and 8 KB of on-chip SRAM with parity error checking. The flash is organized for efficient sector erase and page programming, and the SRAM parity feature enables automatic detection of single-bit errors during runtime-critical for functional safety applications. All memory blocks are accessible via the Arm Cortex-M23 bus matrix without wait states at maximum clock speed.