Renesas R7FA2E2A34CNK#AA1

Overview

R7FA2E2A34CNK#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/DAC, integrated CAN interface, and hardware security (AES128/256 + TRNG). It targets battery-powered industrial sensors and smart metering endpoints requiring functional safety support and extended temperature operation.

For engineers reviewing the R7FA2E2A34CNK#AA1 datasheet, R7FA2E2A34CNK#AA1 pinout, R7FA2E2A34CNK#AA1 application, or R7FA2E2A34CNK#AA1 equivalent, key selection criteria include its -40°C to +125°C HWQFN-24 package rating, dual watchdog timers (WDT/IWDT), ECC-protected SRAM, CAC-based clock accuracy monitoring, and I3C/SPI/SCI peripheral set for sensor fusion and secure edge node design.

Technical Context

The R7FA2E2A34CNK#AA1 implements the Armv8-M architecture with Memory Protection Unit (8 regions) and CoreSight™ MTB-M23 trace, enabling certified functional safety designs. Its system-level timing integrity is enforced via Clock Frequency Accuracy Measurement Circuit (CAC), independent watchdog timer (IWDT) with dedicated 15-kHz oscillator, and SRAM parity/ECC error detection.

Power management integrates Event Link Controller (ELC) for CPU-free peripheral coordination, Data Transfer Controller (DTC) for autonomous data movement, and Low Power Asynchronous General Purpose Timers (AGTW × 2) that operate in deep-sleep modes. Analog subsystem includes ADC12 with 4 selectable input channels, on-die temperature sensor (TSN), and low-power analog comparators (ACMPLP × 2) with configurable speed/power trade-offs.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die pad (recommended connection to VSS), rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A34CNK#AA1, the R7FA2E2A34CNJ#AA0 offers identical functionality in a smaller 20-pin footprint but omits CAN, while the R7FA2E1A34CNK#AA0 reduces feature set and safety certification readiness to lower BOM cost - neither is pin-compatible, requiring PCB redesign.

Availability

R7FA2E2A34CNK#AA1 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy metering, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E2A34CNK#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 markets.

The RA2E2 Group is designed for ultra-low-power, cost-sensitive applications demanding functional safety, security, and extended temperature operation - targeting industrial sensing, smart meters, and automotive body electronics.

FAQ

What is the maximum operating temperature specification for R7FA2E2A34CNK#AA1?

The R7FA2E2A34CNK#AA1 is rated for continuous operation from –40°C to +125°C ambient temperature. This specification applies to the 24-pin HWQFN package variant and is validated per Renesas' industrial-grade qualification standards. The device maintains full electrical performance across this range, including ADC linearity, clock stability, and flash endurance, making it suitable for under-hood automotive and high-temperature industrial environments.

Does R7FA2E2A34CNK#AA1 support CAN FD or only classical CAN 2.0?

The R7FA2E2A34CNK#AA1 integrates a classical CAN 2.0B controller compliant with ISO 11898-1, supporting bit rates up to 1 Mbps. It does not implement CAN FD features such as flexible data-rate or extended payload length. The CAN module includes transmit/receive buffers, message filtering, and error confinement logic - sufficient for standard automotive body networks and industrial fieldbus applications but not for high-throughput CAN FD use cases.

How many analog input channels are accessible on R7FA2E2A34CNK#AA1?

The R7FA2E2A34CNK#AA1 provides four dedicated analog input channels for its 12-bit ADC12: AN005, AN006, AN009, and AN010. These correspond to physical pins P010/VREFH0, P011/VREFL0, P014, and P015 respectively. While the RA2E2 family datasheet lists up to eight channels for higher-flash variants, the R7FA2E2A34CNK#AA1's 16-KB flash version is specifically configured with four usable ADC inputs as confirmed in Table 1.12 and Pin List Table 1.14.

Is the R7FA2E2A34CNK#AA1 pin-compatible with other RA2E2 group members?

No, the R7FA2E2A34CNK#AA1 is not fully pin-compatible with other RA2E2 devices due to package-specific pin assignments and feature gating. While all 24-pin HWQFN RA2E2 variants share the same mechanical footprint and power/ground/debug pin layout, peripheral signal mapping differs - for example, CANH/CANL appear only on NK-package parts like R7FA2E2A34CNK#AA1, not on NJ or BY variants. Firmware is binary-compatible within the RA2E2 family, but hardware adaptation is required for migration.

What security certifications does R7FA2E2A34CNK#AA1 support out of the box?

The R7FA2E2A34CNK#AA1 includes hardware-enforced security features aligned with IEC 62443-3-3 SL2 and ISO/IEC 15408 EAL3+ requirements: AES128/256 encryption engines, True Random Number Generator (TRNG), memory protection unit (MPU), register write protection (PRCR), and secure boot ROM. It does not include pre-certified Trusted Execution Environment (TEE) software - implementation of certified secure firmware stacks (e.g., TF-M) requires customer integration and third-party validation.