Renesas R7FA2E2A52DNK#HA0

Overview

R7FA2E2A52DNK#HA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 32-KB code flash, 8-KB SRAM, 12-bit ADC and DAC, integrated CAN interface, and hardware AES/256 + TRNG for secure edge sensing. It targets battery-powered industrial sensors and smart metering nodes requiring functional safety support and extended temperature operation.

For engineers reviewing the R7FA2E2A52DNK#HA0 datasheet, R7FA2E2A52DNK#HA0 pinout, R7FA2E2A52DNK#HA0 application, or R7FA2E2A52DNK#HA0 equivalent, key selection criteria include its 24-pin HWQFN package with 19 GPIOs (2 × 5-V tolerant), dual low-power timers (AGTW), event-link controller (ELC), and -40°C to +85°C industrial temperature grade.

Technical Context

The R7FA2E2A52DNK#HA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting 8 regions, enabling secure partitioning of firmware and data. Its clock system integrates HOCO/MOCO/LOCO oscillators with trim capability and includes dedicated IWDT and CAC for clock accuracy monitoring.

Analog subsystem integration includes ADC12 with 7 selectable input channels, on-die temperature sensor (TSN), and low-power analog comparators (ACMPLP). Communication peripherals comprise SCI (UART/IIC/SPI/Smart Card), I3C, SPI, and CAN - all accessible via shared pins under ELC-driven event routing to minimize CPU overhead.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die pad recommended connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A52DNK#HA0, R7FA2E2A52DNJ#HA0 sacrifices CAN and I/O count for smaller size, while R7FA2E2A72DNK#HA0 retains full compatibility but doubles flash capacity - making it ideal for scalable firmware development across product tiers.

Availability

R7FA2E2A52DNK#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control edge devices, and building automation controllers requiring stable component supply across extended temperature ranges.

Supply support for R7FA2E2A52DNK#HA0 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 for cost-sensitive, ultra-low-power general-purpose applications demanding security, functional safety, and rich analog integration - targeting battery-operated and energy-harvesting systems.

FAQ

What is the maximum operating frequency of the R7FA2E2A52DNK#HA0?

The R7FA2E2A52DNK#HA0 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 or via external crystal input. The device maintains timing compliance across its full industrial temperature range (-40°C to +85°C) and supply voltage range (1.6 V to 5.5 V), as verified in the R01DS0387EJ0150 datasheet revision 1.50.

Does the R7FA2E2A52DNK#HA0 support CAN communication?

Yes, the R7FA2E2A52DNK#HA0 integrates a full CAN 2.0B module compliant with ISO 11898-1, supporting bit rates up to 1 Mbps and message RAM with filtering. It uses dedicated pins (P103, P102, P101, P100) for CAN_TX, CAN_RX, and associated control signals. This capability is confirmed in Table 1.7 and Figure 1.3 of the R01DS0387EJ0150 datasheet, and applies specifically to the NK-package variants like R7FA2E2A52DNK#HA0.

What package type and pin count does the R7FA2E2A52DNK#HA0 use?

The R7FA2E2A52DNK#HA0 uses a 24-pin HWQFN package measuring 4 mm × 4 mm with 0.5 mm pitch and an exposed die pad. This is confirmed by the part numbering scheme (NK = 24-pin HWQFN) in Figure 1.2 and validated in Table 1.11 and Figure 1.3 of the R01DS0387EJ0150 datasheet. The package supports 19 general-purpose I/O pins, including two 5-V tolerant ports (P400 and P401).

How much flash and SRAM memory does the R7FA2E2A52DNK#HA0 include?

The R7FA2E2A52DNK#HA0 includes 32-KB of code flash memory and 8-KB of on-chip SRAM with parity/ECC protection. It also provides 2-KB of data flash memory rated for 100,000 program/erase cycles. These values are explicitly listed in Table 1.11 and Section 1.1 of the R01DS0387EJ0150 datasheet, and distinguish it from higher-flash variants like R7FA2E2A72DNK#HA0 (64 KB).

What security and safety features are integrated into the R7FA2E2A52DNK#HA0?

The R7FA2E2A52DNK#HA0 integrates AES128/256 acceleration, True Random Number Generator (TRNG), CRC calculator, Data Operation Circuit (DOC), SRAM ECC/parity, flash area protection, ADC self-diagnosis, Clock Accuracy Measurement (CAC), and Independent Watchdog Timer (IWDT). These features collectively support IEC 61508 SIL2 and ISO/SAE 21434 compliance, as detailed in Sections 1.1 and Table 1.7 of the R01DS0387EJ0150 datasheet.