Renesas R7FA0E1053CFJ#BA0

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 with parity, and a 12-bit ADC with 6 input channels. It integrates Serial Array Unit (SAU) supporting simplified SPI/I²C/UART, UARTA, IICA, RTC, TAU timers, and safety features including SRAM parity check, IWDT, and CRC. It targets battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R7FA0E1053CFJ datasheet, R7FA0E1053CFJ pinout, R7FA0E1053CFJ application, or R7FA0E1053CFJ equivalent, key selection criteria include its 32-pin LQFP package, -40°C to +105°C operation, 1.6–5.5 V supply range, integrated TRNG for secure boot, and LIN-bus-capable UART for automotive body electronics integration.

Technical Context

The R7FA0E1053CFJ implements the Armv8-M architecture with TrustZone®-enabled security extensions and supports single-cycle integer multiply/divide. Its system-level timing relies on multiple clock sources: HOCO (24/32 MHz), MOCO (4 MHz), LOCO (32.768 kHz), and external crystal options (1–20 MHz MOSC, 32.768 kHz SOSC).

Safety is enforced via hardware mechanisms: independent watchdog timer (IWDT) driven by LOCO, register write protection (PRCR), illegal memory access detection, and ADC self-diagnosis. The Event Link Controller (ELC) enables CPU-free peripheral-to-peripheral event chaining, while the Data Transfer Controller (DTC) offloads memory transfers triggered by interrupts.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant Sn finish, exposed die pad not present in LQFP variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA0E1073CFJ, the R7FA0E1053CFJ trades flash capacity for lower unit cost while retaining identical safety, timing, and interface capabilities; versus STM32G031F8P6, it delivers certified functional safety, LIN bus readiness, and superior analog integration at comparable price points.

Availability

R7FA0E1053CFJ is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long product 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, power, and SoC solutions for industrial, automotive, and enterprise markets.

The RA0E1 Group is designed for cost-sensitive, ultra-low-power embedded applications demanding functional safety, secure boot, and seamless scalability within the RA family - targeting smart infrastructure and edge sensing.

FAQ

What is the maximum operating frequency of the R7FA0E1053CFJ?

The R7FA0E1053CFJ operates at a maximum frequency of 32 MHz using its Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) or external crystal (MOSC). Frequency scaling is supported via clock dividers, and the device maintains full functionality-including ADC sampling and timer resolution-at all supported clock rates. The R7FA0E1053CFJ datasheet specifies timing margins for all peripherals at this maximum frequency.

Does the R7FA0E1053CFJ support LIN bus communication?

Yes, the R7FA0E1053CFJ supports LIN bus communication through one dedicated UART channel (UART2) within its Serial Array Unit (SAU). This channel implements LIN 2.2A physical layer compliance, including automatic baud rate detection and LIN header checksum generation. The R7FA0E1053CFJ does not require external transceivers for basic LIN slave operation, though a LIN transceiver is needed for bus-level signaling.

How many analog input channels does the R7FA0E1053CFJ ADC support?

The R7FA0E1053CFJ integrates a 12-bit successive approximation ADC (ADC12) with 6 selectable analog input channels (AN000–AN005). This count is confirmed in Table 1.12 of the R7FA0E1053CFJ datasheet, which differentiates it from higher-flash variants offering up to 10 channels. All six channels accept either external sensor signals or internal sources like the temperature sensor output.

What safety features are implemented in hardware on the R7FA0E1053CFJ?

The R7FA0E1053CFJ includes multiple hardware-enforced safety features: SRAM parity error detection and reporting, independent watchdog timer (IWDT) clocked by LOCO, flash area protection registers, cyclic redundancy check (CRC) engine supporting CRC-32 and CRC-CCITT, illegal memory access detection, and GPIO readback level verification. These features are documented in Section 1.3 of the R7FA0E1053CFJ datasheet and require no software polling to function.

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

Yes, the R7FA0E1053CFJ is pin-compatible with other 32-pin LQFP variants in the RA0E1 group, including R7FA0E1073CFJ and R7FA0E1053CNH (HWQFN). Pin assignments, power domains, debug interfaces, and peripheral mappings match across these parts. However, feature availability (e.g., ADC channel count, SAU configuration) may differ - always verify peripheral enablement in the specific variant's datasheet before PCB reuse.