Renesas R7FA2E2A34CNK#BA1

Overview

R7FA2E2A34CNK#BA1 from Renesas 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 AES-128/256 and TRNG. It targets battery-powered industrial sensors, smart metering endpoints, and automotive body electronics requiring functional safety support.

For engineers reviewing the R7FA2E2A34CNK#BA1 datasheet, R7FA2E2A34CNK#BA1 pinout, R7FA2E2A34CNK#BA1 application, or R7FA2E2A34CNK#BA1 equivalent, key selection criteria include its -40°C to +125°C extended temperature rating, 24-pin HWQFN (4 mm × 4 mm) package with 19 GPIOs, ECC-protected SRAM, CAC-based clock accuracy monitoring, and dual watchdog timers (WDT/IWDT) for fail-safe operation.

Technical Context

The R7FA2E2A34CNK#BA1 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 Event Link Controller (ELC) for autonomous peripheral triggering without CPU intervention.

Analog subsystem integration includes a 12-bit ADC with up to four input channels (AN005–AN022), on-die temperature sensor (TSN), and low-power analog comparators (ACMPLP0/1). Communication is served by one SCI (UART/SPI/I²C/Smart Card), one I3C bus, one SPI, and a full CAN 2.0B module - all accessible through dedicated pins in the 24-pin HWQFN footprint.

Key Specifications

Pinout & Package

Package: 24-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 R7FA2E2A34CNK#BA1, the R7FA2E1A34CNK#BA1 offers identical packaging and temperature grade but omits CAN and reduces flash - making it viable for simpler nodes. The STM32G071CBT6 trades integrated CAN and extended temperature for higher clock speed and flash capacity, requiring external components for automotive deployment.

Availability

R7FA2E2A34CNK#BA1 is available at Aetrix Electronics and suitable for automotive body control, industrial predictive maintenance sensors, and energy metering endpoints requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E2A34CNK#BA1 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise markets.

The RA2E2 group delivers ultra-low-power Arm Cortex-M23 MCUs targeting cost-sensitive, safety-aware applications such as smart meters, building automation, and automotive body electronics - emphasizing integrated security, extended temperature operation, and minimal external component count.

FAQ

What is the maximum operating frequency of the R7FA2E2A34CNK#BA1?

The R7FA2E2A34CNK#BA1 features an Arm Cortex-M23 core with a maximum operating frequency of 48 MHz. This clock speed is achieved using the high-speed on-chip oscillator (HOCO) and is fully supported across its entire operating temperature range of -40°C to +125°C. All peripherals - including ADC, DAC, CAN, and timers - are rated for concurrent operation at this frequency without derating.

Does the R7FA2E2A34CNK#BA1 include hardware-based security features?

Yes, the R7FA2E2A34CNK#BA1 integrates AES-128/256 encryption accelerators and a True Random Number Generator (TRNG) compliant with NIST SP 800-90B. These are accessible via the Renesas Secure Crypto Engine (SCE) API and support secure boot, firmware signature verification, and encrypted over-the-air updates - all without external security ICs.

What package type and pin count does the R7FA2E2A34CNK#BA1 use?

The R7FA2E2A34CNK#BA1 uses a 24-pin HWQFN package measuring 4 mm × 4 mm with 0.5 mm pitch and an exposed die pad. This matches the NK suffix in its part number and is validated for reflow soldering per JEDEC J-STD-020. Pin assignments are fixed per Figure 1.3 of the R01DS0387EJ0150 datasheet.

Can the R7FA2E2A34CNK#BA1 operate in automotive under-hood environments?

Yes, the R7FA2E2A34CNK#BA1 is qualified for operation from -40°C to +125°C and supports automotive-grade reliability with built-in features including Independent Watchdog Timer (IWDT), Clock Frequency Accuracy Measurement (CAC), and SRAM ECC. Its 5-V-tolerant pins P400 and P401 further enhance robustness in noisy 12 V systems.

How many analog input channels does the ADC12 support on the R7FA2E2A34CNK#BA1?

The R7FA2E2A34CNK#BA1's 12-bit ADC12 supports four analog input channels: AN005, AN006, AN010, and AN019–AN022 (specifically AN019, AN020, AN021, AN022). This is confirmed in Table 1.12 (Function Comparison) and Table 1.14 (Pin List) of the R01DS0387EJ0150 datasheet for the "R7FA2E2A3xxNK" variant group.