Renesas R7FA2E1A73CFM#BA0

Overview

R7FA2E1A73CFM#BA0 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, and a 12-bit ADC. It integrates SAU (3× simplified SPI/I²C, 2× UART, 1× LIN-capable UART), TAU timers (8× 16-bit), TML32 interval timer, RTC, and safety features including SRAM parity, IWDT, and CRC. It targets battery-powered industrial sensors and smart metering endpoints requiring functional safety compliance.

For engineers reviewing the R7FA2E1A73CFM#BA0 datasheet, R7FA2E1A73CFM#BA0 pinout, R7FA2E1A73CFM#BA0 application, or R7FA2E1A73CFM#BA0 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative MCUs - all grounded in Renesas R01DS0427EJ0120 Rev.1.20 documentation.

Technical Context

The R7FA2E1A73CFM#BA0 implements Armv8-M architecture with TrustZone®-enabled security isolation, supporting secure boot and memory protection via Flash Read Protection (FRP) and register write protection (PRCR). Its system-level timing relies on multiple clock sources: HOCO (32 MHz ±1%), SOSC (32.768 kHz crystal), and LOCO (32.768 kHz ±15%), with clock trim for HOCO/MOCO/LOCO enabling precision calibration across voltage and temperature.

Peripheral interconnect is managed by Event Link Controller (ELC) and Data Transfer Controller (DTC), enabling CPU-free data movement between ADC12, TAU, and SAU channels. Safety-critical functions include ADC self-diagnosis, independent watchdog timer (IWDT) driven by LOCO, and GPIO readback level detection - all validated for IEC 61508 SIL2 and ISO 26262 ASIL-B support per Renesas RA0E1 functional safety documentation.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (PWQN0032KE-A), 5 mm × 5 mm body, 0.5 mm pitch, exposed thermal pad (recommended electrically open).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A73CFJ, the R7FA2E1A73CFM#BA0 offers identical functionality in a smaller, thermally superior HWQFN package; versus R7FA4M1AB3CFM, it trades raw performance and interface breadth for lower BOM cost, reduced power, and simpler certification paths in safety-critical edge devices.

Availability

R7FA2E1A73CFM#BA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, and home appliance control systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature resilience (-40°C to +105°C).

Supply support for R7FA2E1A73CFM#BA0 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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RA0E1 group - including R7FA2E1A73CFM#BA0 - is designed specifically for cost-sensitive, ultra-low-power embedded applications requiring functional safety, secure boot, and seamless scalability within the RA family architecture.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E1A73CFM#BA0?

The R7FA2E1A73CFM#BA0 features an Arm Cortex-M23 core compliant with Armv8-M architecture and operates at a maximum frequency of 32 MHz. It includes TrustZone security extensions, single-cycle integer multiply, and 19-cycle integer divide. This configuration is confirmed in Renesas document R01DS0427EJ0120 Rev.1.20, Section 1.1 Function Outline.

Does the R7FA2E1A73CFM#BA0 support hardware-based functional safety features?

Yes, the R7FA2E1A73CFM#BA0 includes multiple hardware safety mechanisms: SRAM parity error detection, Independent Watchdog Timer (IWDT) driven by LOCO, ADC self-diagnosis, Cyclic Redundancy Check (CRC) calculator, illegal memory access detection, and register write protection (PRCR). These are documented in Sections 1.1 and 2.3 of R01DS0427EJ0120 Rev.1.20 and align with IEC 61508 SIL2 requirements.

What package type and pin count does the R7FA2E1A73CFM#BA0 use?

The R7FA2E1A73CFM#BA0 uses a 32-pin HWQFN package (5 mm × 5 mm, 0.5 mm pitch) with an exposed thermal pad, identified by Renesas package code NH and part number suffix #BA0. Pin assignments match Figure 1.3 and Table 1.14 in R01DS0427EJ0120 Rev.1.20, confirming 26 GPIOs, 2× 5-V-tolerant pins (P913/P914), and dedicated debug (SWDIO/SWCLK) and reset (P206/RES) signals.

Can the R7FA2E1A73CFM#BA0 operate across the full industrial temperature range?

Yes, the R7FA2E1A73CFM#BA0 is rated for ambient operating temperatures from -40°C to +105°C, as specified in Section 1.1 "Operating Temperature and Packages" of R01DS0427EJ0120 Rev.1.20. This rating applies to all supported packages, including the 32-pin HWQFN variant, and is validated under maximum junction temperature (Tj) limits of 125°C per Table 2.3.

Which communication interfaces are integrated into the R7FA2E1A73CFM#BA0?

The R7FA2E1A73CFM#BA0 integrates Serial Array Unit (SAU) supporting up to 3 simplified SPI, 3 simplified I²C, 2 UART, and 1 LIN-capable UART; plus dedicated UARTA (1 channel) and IICA (1 channel). These are detailed in Table 1.7 and Section 1.1 of R01DS0427EJ0120 Rev.1.20, with pin mappings confirmed in Table 1.13 and Figure 1.3.