Renesas R7FA4W1AD2CNG#AA0

Overview

R7FA4W1AD2CNG#AA0 from Renesas Electronics is a 32-bit Arm Cortex-M4 microcontroller with FPU, integrated Bluetooth 5.0 LE transceiver, Segment LCD Controller (SLCDC), Capacitive Touch Sensing Unit (CTSU), USB 2.0 Full-Speed interface, 14-bit ADC, and 12-bit DAC - designed for ultra-low-power wireless HMI applications such as smart thermostats, portable medical monitors, and BLE-enabled industrial sensors.

For engineers reviewing the R7FA4W1AD2CNG#AA0 datasheet, R7FA4W1AD2CNG#AA0 pinout, R7FA4W1AD2CNG#AA0 application, or R7FA4W1AD2CNG#AA0 equivalent, key selection considerations include its 56-pin QFN package, 48 MHz max CPU frequency, 512 KB code flash + 96 KB SRAM memory configuration, BLE RF integration with +4 dBm output, and dual-role USBFS supporting Battery Charging Specification 1.2.

Technical Context

The R7FA4W1AD2CNG#AA0 implements an Armv7E-M architecture with DSP extensions and single-precision FPU, operating at up to 48 MHz with 8-region MPU protection and CoreSight debug support (JTAG/SWD). Its system-level timing relies on multiple clock sources including MOSC (1–20 MHz), SOSC (32.768 kHz), and dedicated BLE/USB oscillators.

Peripheral coherency is enabled via Event Link Controller (ELC), allowing autonomous module interaction without CPU intervention. Memory safety includes ECC-protected 16 KB SRAM, parity-checked 80 KB SRAM, Flash area protection, and CAC-based clock accuracy monitoring - all aligned with functional safety requirements for industrial edge devices.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch), RoHS-compliant, tray-packaged (#AA0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA4W1AD2CNG#AA0, the R7FA4M1AD2CFM#AA0 trades BLE integration for stronger wired protocol support and deterministic compute acceleration, while the nRF52840-QIAA offers broader wireless protocol coverage but lacks integrated HMI peripherals and USB host capability - making R7FA4W1AD2CNG#AA0 optimal for cost-sensitive, display-equipped BLE endpoints.

Availability

R7FA4W1AD2CNG#AA0 is available at Aetrix Electronics and suitable for smart home controllers, portable medical sensors, industrial BLE nodes, and USB-C smart plugs requiring stable component supply across long-lifecycle production programs.

Supply support for R7FA4W1AD2CNG#AA0 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R7FA4W1AD2CNG#AA0 belongs to the RA4W1 Group - a wireless-optimized subfamily of the Renesas Advanced (RA) MCU platform, designed specifically for ultra-low-power, BLE-integrated human-machine interface applications with integrated display and touch support.

FAQ

What is the maximum operating frequency of the R7FA4W1AD2CNG#AA0?

The R7FA4W1AD2CNG#AA0 features an Arm Cortex-M4 core with floating-point unit that operates at a maximum frequency of 48 MHz. This speed is achieved using the high-speed on-chip oscillator (HOCO) or main crystal oscillator (MOSC), and is confirmed in the official Renesas RA4W1 datasheet Rev.1.00, Section 1.1. The 48 MHz limit balances performance, power efficiency, and thermal constraints for its 56-pin QFN package.

Does the R7FA4W1AD2CNG#AA0 support USB device and host modes simultaneously?

The R7FA4W1AD2CNG#AA0 USB 2.0 Full-Speed (USBFS) module supports both device and host modes, but not simultaneously - it operates in one mode at a time, configurable via software. The module includes an on-chip transceiver and complies with USB Battery Charging Specification 1.2. Mode selection is controlled through the USBFS registers during initialization, as documented in Section 28 of the RA4W1 User's Manual.

What BLE features are implemented in hardware on the R7FA4W1AD2CNG#AA0?

The R7FA4W1AD2CNG#AA0 integrates a complete Bluetooth 5.0 Low Energy subsystem: on-die RF transceiver, link layer, LE 1M/2M/Coded PHY support, +4 dBm transmit power, dedicated AES-CCM encryption circuit, and BLE-dedicated clock oscillators (XTAL1_RF/XTAL2_RF). These features are silicon-verified per Renesas R01DS0359EJ0100 datasheet Section 1. Overview and eliminate the need for external BLE modules or cryptographic accelerators.

How much SRAM on the R7FA4W1AD2CNG#AA0 is protected with ECC?

Of the total 96 KB SRAM on the R7FA4W1AD2CNG#AA0, 16 KB is protected with Error Correction Code (ECC), while the remaining 80 KB uses parity checking. This split is defined in the RA4W1 datasheet Section 1.1 (Table 1.2) and User's Manual Section 42, and enables selective placement of critical firmware stacks and real-time buffers in ECC-protected memory for functional safety compliance.

Can the R7FA4W1AD2CNG#AA0 drive a segment LCD and perform capacitive touch sensing at the same time?

Yes, the R7FA4W1AD2CNG#AA0 concurrently supports both functions: the Segment LCD Controller (SLCDC) drives up to 4 commons × 9 segments, and the Capacitive Touch Sensing Unit (CTSU) manages up to 11 electrodes. These peripherals operate independently with separate clock domains and DMA channels, enabling simultaneous display refresh and touch scan - a capability verified in Renesas Application Note R01AN3919JJ0100 and confirmed in Section 1.1 Table 1.9 of the datasheet.