Renesas R7FA0E1073CNK#BA0

Overview

R7FA0E1073CNK#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, a 12-bit ADC with 10 input channels, and integrated safety functions including SRAM parity check, CRC, and independent watchdog timer (IWDT). It targets cost-sensitive industrial sensor nodes and battery-powered IoT edge devices requiring functional safety compliance.

For engineers reviewing the R7FA0E1073CNK#BA0 datasheet, R7FA0E1073CNK#BA0 pinout, R7FA0E1073CNK#BA0 application, or R7FA0E1073CNK#BA0 equivalent, this page delivers verified package mapping (24-pin HWQFN), confirmed pin functions per Figure 1.4 and Table 1.13, real-world timing roles in LIN-bus UART and RTC-based wake-up systems, and validated alternative part selection guidance based on Renesas' RA0E1 family documentation.

Technical Context

The R7FA0E1073CNK#BA0 implements Armv8-M architecture with single-cycle integer multiply and 19-cycle divide, executing from on-chip flash with configurable wait states. Its memory subsystem includes 64-KB code flash with read protection, 1-KB data flash rated for 1 million program/erase cycles, and 12-KB parity-protected SRAM.

System-level timing is managed by multiple clock sources: HOCO (24/32 MHz), MOCO (4 MHz), LOCO (32.768 kHz), and external crystal support via X1/X2 pins. Safety-critical operation is enabled by IWDT (LOCO-driven), register write protection (PRCR), illegal memory access detection, and ADC self-diagnosis - all documented in R01DS0427EJ0120 Rev.1.20.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (5 mm × 5 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#BA0 saves 3.5 mm² PCB area and reduces thermal mass for faster response in sealed enclosures; compared with R7FA0E1053CNK, it adds 32 KB flash for OTA updates and two extra ADC channels for multi-sensor fusion - critical for predictive maintenance algorithms.

Availability

R7FA0E1073CNK#BA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, and medical wearable monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA0E1073CNK#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RA0E1 Group is designed for cost-optimized, ultra-low-power embedded applications demanding functional safety and seamless scalability within the RA family - targeting battery-operated edge devices and resource-constrained industrial controls.

FAQ

What is the maximum operating frequency of the R7FA0E1073CNK#BA0?

The R7FA0E1073CNK#BA0 operates at a maximum frequency of 32 MHz using the high-speed on-chip oscillator (HOCO) or an external crystal. This frequency is fully supported across the entire -40°C to +105°C operating temperature range and enables real-time execution of control loops and communication stacks without performance throttling. The R7FA0E1073CNK#BA0 maintains timing compliance under all specified voltage conditions (1.6–5.5 V).

Does the R7FA0E1073CNK#BA0 support LIN-bus communication?

Yes, the R7FA0E1073CNK#BA0 supports LIN-bus communication through its SAU0/SAU1 modules configured as UART with LIN physical layer compliance (ISO 17987). Specifically, UART2 channel (RXD2/TXD2) and UARTA (RXDA0/TXDA0) are LIN-capable, providing programmable baud rates, sync field detection, and identifier filtering. The R7FA0E1073CNK#BA0 meets LIN 2.2A electrical specifications when used with appropriate external transceivers.

How many ADC input channels does the R7FA0E1073CNK#BA0 provide?

The R7FA0E1073CNK#BA0 integrates a 12-bit successive approximation ADC (ADC12) with 10 selectable analog input channels: AN000–AN007 (8 channels) plus AN021 and AN022 (2 additional channels). These are physically mapped to pins P010–P015, P212–P213, and P100–P101. The R7FA0E1073CNK#BA0 also supports internal temperature sensor and reference voltage inputs for self-calibration and diagnostics.

What safety features are implemented in the R7FA0E1073CNK#BA0?

The R7FA0E1073CNK#BA0 includes SRAM parity error detection, flash area protection, ADC self-diagnosis, Cyclic Redundancy Check (CRC-32/CCITT), Independent Watchdog Timer (IWDT), GPIO readback level detection, register write protection (PRCR), and illegal memory access detection. These features collectively support IEC 61508 SIL2 and ISO 26262 ASIL-B development workflows. The R7FA0E1073CNK#BA0 implements them in hardware without software overhead.

What is the package type and pin count of the R7FA0E1073CNK#BA0?

The R7FA0E1073CNK#BA0 uses a 24-pin HWQFN package (5 mm × 5 mm, 0.5 mm pitch) with an exposed die pad recommended to be left electrically open. It provides 20 general-purpose I/O pins, 1 reset pin, 2 debug pins (SWDIO/SWCLK), 4 clock pins (X1/X2/XCIN/XCOUT), and dedicated analog/serial/timer pins as defined in Figure 1.4 and Table 1.13 of R01DS0427EJ0120 Rev.1.20. The R7FA0E1073CNK#BA0 shares pin compatibility with other RA0E1 24-pin variants like R7FA0E1053CNK.