Renesas R7FA0E1053CFJ#AA0

Overview

R7FA0E1053CFJ from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 32 MHz, featuring 32-KB code flash, 12-KB SRAM, a 12-bit ADC with 8 input channels, UART/LIN, I²C, and SPI interfaces, and safety features including SRAM parity, CRC, and independent watchdog timer - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R7FA0E1053CFJ datasheet, R7FA0E1053CFJ pinout, R7FA0E1053CFJ application, or R7FA0E1053CFJ equivalent, this page delivers verified package mapping (32-pin LQFP), confirmed pin functions per Figure 1.3 and Table 1.13, functional safety mechanisms (IWDT, LVD0/LVD1, register write protection), and real-world timing roles in low-power sensor node firmware.

Technical Context

The R7FA0E1053CFJ implements the Armv8-M architecture with TrustZone®-enabled security extensions, supporting secure boot and isolated execution environments. Its system-level peripherals include an Event Link Controller (ELC) for CPU-free peripheral chaining and a Data Transfer Controller (DTC) enabling autonomous memory transfers triggered by interrupts.

It integrates dual clock domains: high-speed operation via HOCO (up to 32 MHz, ±1% accuracy when trimmed) and ultra-low-power real-time functions via LOCO (32.768 kHz) driving RTC and IWDT. The SAU supports three simplified SPI/I²C/UART channels simultaneously, while UARTA adds LIN-bus compliance for automotive body electronics integration.

Key Specifications

Pinout & Package

32-pin LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, with exposed die pad recommended electrically open. Pin 1 marked by dot; top-view orientation per Figure 1.3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA0E1053CFJ, R7FA0E1073CFJ offers double flash capacity without layout changes, while R7FA2E1053CFJ introduces architectural upgrades (FPU, larger SRAM) that increase BOM cost and power - making R7FA0E1053CFJ optimal for cost-sensitive, flash-constrained embedded control where raw compute or crypto acceleration isn't required.

Availability

R7FA0E1053CFJ is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA0E1053CFJ 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 targets ultra-low-power, cost-optimized embedded applications - designed specifically for battery-operated sensors, smart meters, and entry-level industrial controls where energy efficiency and functional safety coexist within tight BOM constraints.

FAQ

What is the maximum operating frequency of the R7FA0E1053CFJ?

The R7FA0E1053CFJ features an Arm Cortex-M23 core with a maximum operating frequency of 32 MHz. This speed is achievable using the high-speed on-chip oscillator (HOCO) or an external crystal up to 20 MHz multiplied internally. The device maintains full functionality across its entire operating voltage range (1.6–5.5 V) and temperature range (−40°C to +105°C), as validated in the R01DS0427EJ0120 datasheet Rev.1.20.

Does the R7FA0E1053CFJ support LIN bus communication?

Yes, the R7FA0E1053CFJ supports LIN bus communication through its UARTA peripheral, which includes dedicated LIN protocol features such as automatic sync field detection and break signal generation. This capability is explicitly documented in Table 1.7 of the R01DS0427EJ0120 datasheet, enabling direct integration into automotive body electronics without requiring external LIN transceivers.

How many analog input channels does the R7FA0E1053CFJ ADC support?

The R7FA0E1053CFJ integrates a 12-bit ADC12 module supporting up to 10 analog input channels: eight dedicated pins (AN000–AN007) plus two additional inputs (AN021, AN022) multiplexed with GPIO. This configuration is confirmed in Table 1.14 (Pin List) and Section 1.8 (Analog) of the R01DS0427EJ0120 datasheet, with all channels usable simultaneously under proper software configuration.

What safety features are implemented in the R7FA0E1053CFJ?

The R7FA0E1053CFJ implements multiple hardware-enforced safety features: SRAM parity error detection, flash area protection, ADC self-diagnosis, Cyclic Redundancy Check (CRC-32), Independent Watchdog Timer (IWDT), Low Voltage Detection (LVD0/LVD1), GPIO readback level detection, register write protection, and illegal memory access detection - all detailed in Section 1.3 (Safety) of the R01DS0427EJ0120 datasheet.

Is the R7FA0E1053CFJ pin-compatible with other RA0E1 family members?

Yes, the R7FA0E1053CFJ in the 32-pin LQFP package (FJ suffix) shares identical pinout and peripheral mapping with other 32-pin RA0E1 variants like R7FA0E1073CFJ, as confirmed in Figure 1.3 and Table 1.14 of the R01DS0427EJ0120 datasheet. This allows drop-in replacement for flash-capacity upgrades without PCB redesign.