Renesas R7FA0E1073CFJ#AA0

Overview

R7FA0E1073CFJ 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, integrated temperature sensor, and safety features including SRAM parity check, CRC, and independent watchdog timer. It targets battery-powered industrial sensors and smart metering endpoints requiring extended runtime and functional safety compliance.

For engineers reviewing the R7FA0E1073CFJ datasheet, R7FA0E1073CFJ pinout, R7FA0E1073CFJ application, or R7FA0E1073CFJ equivalent, this page delivers verified electrical specs, LQFP-32 pin mapping, real-time clock and SAU-based serial interface configuration details, and validated alternative MCUs for cost-sensitive, low-power embedded designs.

Technical Context

The R7FA0E1073CFJ implements Armv8-M architecture with TrustZone®-enabled security extensions and supports dual-clock domain operation via HOCO (32 MHz), LOCO (32.768 kHz), and external crystal inputs. Its Event Link Controller (ELC) enables hardware-triggered peripheral chaining without CPU intervention, while the Data Transfer Controller (DTC) offloads memory transfers during UART/ADC operations.

Safety is enforced through register write protection (PRCR), flash area protection, ADC self-diagnosis, illegal memory access detection, and GPIO readback level verification. The 12-bit ADC12 integrates internal reference selection and temperature sensor output routing, and the TAU timer array provides 8×16-bit channels configurable as PWM outputs or cascaded high-resolution timers.

Key Specifications

Pinout & Package

32-pin LQFP package (PLQP0032GB-A) with exposed die pad recommended electrically open; pin 1 marked by dot or notch; VCC/VSS decoupling requires 0.1-µF ceramic capacitor placed adjacent to pins 7 and 4 respectively.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1073CFJ and R7FA4M1AB3CFM, the R7FA0E1073CFJ delivers the lowest active and sleep current among RA0E1 series devices, making it uniquely suited for energy harvesting and coin-cell-powered applications where peripheral integration and safety certification outweigh raw compute throughput.

Availability

R7FA0E1073CFJ is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and medical wearables requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature range (-40°C to +105°C).

Supply support for R7FA0E1073CFJ 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

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

FAQ

What is the maximum operating frequency and core architecture of the R7FA0E1073CFJ?

The R7FA0E1073CFJ features an Arm Cortex-M23 core compliant with Armv8-M architecture and operates at a maximum frequency of 32 MHz. This core supports TrustZone security extensions and delivers deterministic real-time performance with single-cycle integer multiply and 19-cycle integer divide. The R7FA0E1073CFJ uses HOCO or external crystal as its primary clock source, and its instruction execution timing is fully characterized in the R01DS0427EJ0120 datasheet.

Does the R7FA0E1073CFJ support hardware-based functional safety features required for IEC 61508 compliance?

Yes, the R7FA0E1073CFJ includes multiple hardware safety mechanisms: SRAM parity error detection, flash area protection, independent watchdog timer (IWDT), illegal memory access detection, register write protection (PRCR), and ADC self-diagnosis. These features collectively support development toward IEC 61508 SIL2 compliance. The R7FA0E1073CFJ datasheet documents all safety-related registers and diagnostic procedures required for certification evidence generation.

How many analog input channels does the 12-bit ADC12 in the R7FA0E1073CFJ support, and what reference options are available?

The R7FA0E1073CFJ integrates a 12-bit successive approximation ADC12 supporting up to 10 analog input channels (AN000–AN007, AN021–AN022). Reference options include external voltage applied to VREFH0/VREFL0 pins or internal VCC/VSS. The on-die temperature sensor output is also selectable as an ADC input channel, enabling die temperature monitoring without external components. All specifications are confirmed in Section 1.8 of the R01DS0427EJ0120 datasheet.

What serial communication interfaces are available on the R7FA0E1073CFJ, and how are they implemented?

The R7FA0E1073CFJ provides Serial Array Unit (SAU) with six configurable channels supporting simplified SPI, I²C, or UART protocols; one dedicated UARTA channel; and one I²C Bus Interface (IICA) channel. SAU channels can be assigned independently per function, and UART2 supports LIN-bus physical layer signaling. Pin assignments for each interface are defined in Table 1.13 and Figure 1.3 of the R01DS0427EJ0120 datasheet, with multiplexing controlled via peripheral enable registers.

What package type and pin count does the R7FA0E1073CFJ use, and are there any special PCB layout considerations?

The R7FA0E1073CFJ uses a 32-pin LQFP package (PLQP0032GB-A) measuring 7 mm × 7 mm with 0.8 mm pitch. Key layout requirements include placing 0.1-µF ceramic decoupling capacitors adjacent to VCC (pin 7) and VSS (pin 4), connecting VCL (pin 1) to VSS via a 0.47–1 µF capacitor, and leaving the exposed die pad electrically unconnected. These guidelines are specified in Section 1.6 and Table 2.1 of the R01DS0427EJ0120 datasheet.