Renesas R7FA0E1073CNK#HA0

Overview

R7FA0E1073CNK#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, and a 12-bit ADC with 10-channel analog input support. It integrates safety features including SRAM parity check, independent watchdog timer (IWDT), and CRC calculation, and targets cost-sensitive industrial sensor nodes and battery-powered control systems.

For engineers reviewing the R7FA0E1073CNK#HA0 datasheet, R7FA0E1073CNK#HA0 pinout, R7FA0E1073CNK#HA0 application, or R7FA0E1073CNK#HA0 equivalent, this page delivers verified specifications, validated 24-pin HWQFN package mapping, confirmed SAU/UARTA/IICA peripheral configuration, and real-world use cases in low-voltage industrial monitoring and functional-safety-constrained edge devices.

Technical Context

The R7FA0E1073CNK#HA0 implements the Armv8-M architecture with TrustZone®-enabled security extensions and supports dual-clock domain operation via HOCO (32 MHz) and LOCO (32.768 kHz) oscillators. Its system-level timing relies on the Event Link Controller (ELC) for CPU-free peripheral triggering and the Data Transfer Controller (DTC) for autonomous memory transfers.

It delivers deterministic real-time behavior through eight 16-bit Timer Array Unit (TAU) channels - configurable as independent timers or combined for PWM generation - and a flexible 32-bit Interval Timer (TML32) supporting 32-bit counter mode, two 16-bit modes, or four 8-bit modes. The integrated Temperature Sensor (TSN) feeds directly into ADC12 for on-die thermal monitoring.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (PWQN0024KG-A), 4 mm × 4 mm, 0.5 mm pitch, exposed die pad (recommended electrically open).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA0E1073CFJ, the R7FA0E1073CNK#HA0 reduces PCB footprint by 44% and lowers thermal resistance via smaller QFN, while retaining full safety features and analog capability; versus R7FA0E1053CNK, it doubles flash capacity for future-proofed firmware updates and feature-rich edge processing.

Availability

R7FA0E1073CNK#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, functional safety PLC modules, and energy meter front-ends requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R7FA0E1073CNK#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-optimized, ultra-low-power embedded applications demanding functional safety, secure boot, and rich analog integration - targeting industrial automation, building controls, and battery-operated edge devices.

FAQ

What is the maximum operating frequency of the R7FA0E1073CNK#HA0?

The R7FA0E1073CNK#HA0 operates at a maximum frequency of 32 MHz using its high-speed on-chip oscillator (HOCO). This frequency is fully supported across the full operating voltage range (1.6–5.5 V) and temperature range (−40°C to +105°C), enabling deterministic real-time performance for time-critical control loops without external clock components.

Does the R7FA0E1073CNK#HA0 support LIN bus communication?

Yes, the R7FA0E1073CNK#HA0 supports LIN bus communication through one dedicated UART channel (UART2) within its Serial Array Unit (SAU). This channel is explicitly listed in Table 1.12 as "UART supporting LIN-bus" and meets ISO 17987-4 physical layer timing requirements when configured with appropriate baud rate and slew-rate settings.

How many analog input channels does the ADC12 support on the R7FA0E1073CNK#HA0?

The ADC12 on the R7FA0E1073CNK#HA0 supports up to 10 analog input channels: AN000 through AN007 (8 channels), plus AN021 and AN022 (2 additional channels). This count is confirmed in Table 1.12 and matches the pin listing for the 24-pin HWQFN package (P010–P015, P212–P215, P200–P201), with no reduction relative to larger-package variants.

What safety certifications or features are implemented in the R7FA0E1073CNK#HA0?

The R7FA0E1073CNK#HA0 implements multiple hardware-assisted safety features: SRAM parity error detection, flash area protection, ADC self-diagnosis, Cyclic Redundancy Check (CRC) engine, Independent Watchdog Timer (IWDT) with LOCO clock source, GPIO readback level detection, register write protection, and illegal memory access detection - collectively supporting IEC 61508 SIL2 compliance.

Is the R7FA0E1073CNK#HA0 pin-compatible with other RA0E1 family members?

No, the R7FA0E1073CNK#HA0 is not pin-compatible with other RA0E1 variants due to its 24-pin HWQFN package (PWQN0024KG-A), which differs from the 32-pin LQFP/HWQFN, 20-pin LSSOP/TSSOP, and 16-pin HWQFN packages in the same family. Pin assignments, I/O count (20), and peripheral multiplexing are specific to this 24-pin variant as defined in Figure 1.4 and Table 1.14.