Renesas R7FA2A1AB3CFM#AA0

Overview

R7FA2A1AB3CFM from Renesas Electronics is an Arm Cortex-M23-based 32-bit microcontroller designed for low-power, cost-sensitive industrial and human-machine interface applications. It operates at up to 48 MHz, integrates 256 KB code flash, 32 KB SRAM, dual ADCs (16-bit SAR and 24-bit sigma-delta), USB 2.0 Full-Speed with on-chip transceiver, CAN 2.0B, and capacitive touch sensing - enabling compact, secure, sensor-rich edge nodes.

For engineers reviewing the R7FA2A1AB3CFM datasheet, R7FA2A1AB3CFM pinout, R7FA2A1AB3CFM application, or R7FA2A1AB3CFM equivalent, key selection considerations include its 64-pin LQFP package with 46 GPIOs (9 of which are 5 V tolerant), integrated analog front-end (OPAMP ×3, DAC12, DAC8 ×2), hardware security (AES128/256, TRNG), and functional safety features (ECC/SRAM parity, IWDT, CAC).

Technical Context

The R7FA2A1AB3CFM implements a single-core Arm Cortex-M23 (Armv8-M) with TrustZone support, executing at 48 MHz with MPU-enforced memory protection across 8 regions. Its system architecture couples dual high-precision analog subsystems - ADC16 (1.2 Msps, 17-channel) and SDADC24 (15.6 ksps, PGA-equipped) - with independent digital peripherals including GPT32/GPT16 timers for motor control and AGT for ultra-low-power timing.

Connectivity is unified via three SCI modules (UART/IIC/SPI), two I2C buses, two SPI interfaces, one CAN 2.0B controller (32 mailboxes), and USBFS with Battery Charging Spec 1.2 compliance. Power management includes five low-power modes, LVD with programmable thresholds, and clock sources ranging from 15 kHz (IWDT oscillator) to 48 MHz (HOCO), all managed by ELC and DTC for CPU-offload operation.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PLQP0064KB-C), 10 mm × 10 mm, 0.5 mm pitch, operating temperature range −40°C to +105°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A93CFM, the R7FA2A1AB3CFM adds SDADC24 and CTSU for sensor/touch use cases; compared with R7FA4M1AB3CFM, it trades FPU and higher interrupt bandwidth for integrated USB and superior analog resolution - making it optimal for cost-constrained, analog-centric industrial edge nodes.

Availability

R7FA2A1AB3CFM is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, HMI panels, and BLDC motor control modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for R7FA2A1AB3CFM 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 IoT markets.

The R7FA2A1AB3CFM belongs to the RA2A1 group - a family of energy-efficient, secure Arm Cortex-M23 MCUs designed specifically for cost-sensitive, low-power industrial HMI and sensor-edge applications with integrated analog and USB connectivity.

FAQ

What is the maximum operating frequency of the R7FA2A1AB3CFM?

The R7FA2A1AB3CFM operates at a maximum frequency of 48 MHz using its Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) at 48 MHz or external crystal sources within the supported 1–20 MHz range. The core maintains full performance across its rated temperature range of −40°C to +105°C.

Does the R7FA2A1AB3CFM support USB device functionality without external components?

Yes, the R7FA2A1AB3CFM integrates a USB 2.0 Full-Speed transceiver with an internal LDO regulator, enabling standalone USB device operation. It supports Battery Charging Specification 1.2 and requires only passive termination (1.5 kΩ pull-up on D+) and standard USB connectors - no external PHY or level-shifting circuitry is needed for basic HID or CDC implementations.

How many analog-to-digital converters does the R7FA2A1AB3CFM include, and what are their key specifications?

The R7FA2A1AB3CFM includes two independent ADC subsystems: a 16-bit successive-approximation ADC (ADC16) with 1.2 Msps sampling rate and up to 17 single-ended channels, and a 24-bit sigma-delta ADC (SDADC24) with 15.6 ksps and integrated programmable-gain instrumentation amplifier. Both support differential and single-ended inputs, internal reference selection, and calibration for <±1 LSB total unadjusted error.

What safety and security features are implemented in hardware on the R7FA2A1AB3CFM?

The R7FA2A1AB3CFM includes hardware-based safety and security features: Error Correction Code (ECC) and parity protection for SRAM, Flash area protection, Independent Watchdog Timer (IWDT) with dedicated oscillator, Clock Frequency Accuracy Measurement Circuit (CAC), CRC calculator, Data Operation Circuit (DOC), and hardware AES128/256 encryption with True Random Number Generator (TRNG). These meet IEC 61508 SIL-2 and Common Criteria EAL4+ foundational requirements.

Is the R7FA2A1AB3CFM pin-compatible with other members of the RA2A1 family?

Yes, the R7FA2A1AB3CFM is pin-compatible with other 64-pin LQFP variants in the RA2A1 family, such as R7FA2E1A93CFM. All share identical pin functions, electrical characteristics, and footprint (PLQP0064KB-C), enabling direct substitution in designs where flash size, analog features, or security requirements align - though firmware must be validated for peripheral enablement differences.