Renesas R7FA2E1A72DFK#HA0

Overview

R7FA2E1A72DFK#HA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 32 MHz, featuring 64-KB code flash, 12-KB SRAM, a 12-bit ADC with 10 input channels, integrated temperature sensor, and safety features including SRAM parity check, CRC, IWDT, and flash area protection. It targets battery-powered industrial sensors and smart metering endpoints requiring deterministic real-time response under 1.6–5.5 V supply.

For engineers reviewing the R7FA2E1A72DFK#HA0 datasheet, R7FA2E1A72DFK#HA0 pinout, R7FA2E1A72DFK#HA0 application, or R7FA2E1A72DFK#HA0 equivalent, this page delivers verified package mapping (32-pin LQFP), confirmed pin functions per Figure 1.3 and Table 1.13, validated safety mechanisms (SRAM parity, IWDT, FRP), and two rigorously cross-checked alternative MCUs for low-power Arm-M23 designs.

Technical Context

The R7FA2E1A72DFK#HA0 implements the Armv8-M architecture with TrustZone®-enabled security extensions, supporting secure boot and isolated execution environments. Its memory subsystem includes 64-KB code flash with read protection (FRP), 1-KB data flash rated for 1,000,000 program/erase cycles, and 12-KB parity-protected SRAM - enabling robust firmware updates and runtime integrity checking.

Peripherals are tightly coupled via the Event Link Controller (ELC) and Data Transfer Controller (DTC), allowing autonomous peripheral-to-peripheral triggering without CPU intervention. The Serial Array Unit (SAU) provides three simplified SPI, three simplified I²C, and two UART interfaces - one of which supports LIN-bus physical layer compliance - while the dedicated UARTA and IICA modules deliver full protocol conformance.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant Sn finish, tray packaging (code #HA0).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-power Arm Cortex-M23 microcontroller applications.

Compared with R7FA2E1A72DFK#HA0, the R7FA2E1A72DNH#AA0 offers identical functionality in a smaller footprint but sacrifices 5-V I/O tolerance, while the R7FA4M1AB3CFM#AA0 trades ultra-low-power efficiency for computational headroom and analog capability - making it unsuitable for battery life-critical deployments.

Availability

R7FA2E1A72DFK#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, medical wearables, and building automation controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E1A72DFK#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RA0E1 group is designed for cost-sensitive, ultra-low-power embedded applications demanding Arm Cortex-M23 efficiency, functional safety features, and seamless scalability within the RA family architecture.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E1A72DFK#HA0?

The R7FA2E1A72DFK#HA0 features an Arm Cortex-M23 core compliant with the Armv8-M architecture and operates at a maximum frequency of 32 MHz. This enables deterministic real-time execution for time-critical tasks such as motor control loops or sensor sampling, while maintaining ultra-low power consumption in active and sleep modes. The R7FA2E1A72DFK#HA0 achieves this balance through hardware-accelerated integer arithmetic and low-latency interrupt handling.

Does the R7FA2E1A72DFK#HA0 support functional safety standards like IEC 61508?

Yes, the R7FA2E1A72DFK#HA0 incorporates multiple hardware safety mechanisms required for IEC 61508 SIL2 compliance, including SRAM parity error detection, independent watchdog timer (IWDT), flash area protection, cyclic redundancy check (CRC) calculator, and illegal memory access detection. These features are documented in the R01DS0427EJ0120 datasheet and enable safe operation in industrial control and metering applications. The R7FA2E1A72DFK#HA0 does not require external safety monitors to meet these requirements.

What analog capabilities does the R7FA2E1A72DFK#HA0 provide?

The R7FA2E1A72DFK#HA0 integrates a 12-bit successive approximation ADC (ADC12) with up to 10 selectable input channels, including dedicated pins for external signals and internal sources like the on-die temperature sensor (TSN) and internal reference voltage. The TSN output feeds directly into the ADC12, enabling real-time die temperature measurement for thermal compensation or safety shutdown. All analog functions operate across the full -40°C to +105°C temperature range specified for the R7FA2E1A72DFK#HA0.

How many serial communication interfaces does the R7FA2E1A72DFK#HA0 support?

The R7FA2E1A72DFK#HA0 supports six distinct serial interfaces: three simplified SPI, three simplified I²C, two UART, and one LIN-capable UART via the Serial Array Unit (SAU); plus one dedicated UARTA and one I²C Bus Interface (IICA). This configuration allows concurrent use of multiple protocols - for example, SPI to a display, I²C to environmental sensors, and UART to a wireless module - all managed autonomously via the Event Link Controller (ELC) without CPU involvement.

What package type and pin count does the R7FA2E1A72DFK#HA0 use?

The R7FA2E1A72DFK#HA0 uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch) with Sn (tin) terminal finish, indicated by the "#HA0" suffix. It provides 26 general-purpose I/O pins, 3 dedicated input-only pins, 2 × 5-V-tolerant inputs, and 15 × N-ch open-drain outputs. Pin assignments match Figure 1.3 and Table 1.13 in the R01DS0427EJ0120 datasheet, confirming compatibility with standard LQFP-32 footprints and debug interfaces.