Renesas R7FS3A6783A01CFL#AA0

Overview

R7FS3A6783A01CFL#AA0 from Renesas is a 48-MHz Arm Cortex-M4 microcontroller with FPU, 256-KB code flash, 32-KB SRAM, integrated Segment LCD Controller (SLCDC), Capacitive Touch Sensing Unit (CTSU), USB 2.0 Full-Speed interface, 14-bit ADC, and AES/SHA security engine - designed for low-power human-machine interface applications such as smart meters and industrial HMIs operating from -40°C to +105°C.

For engineers reviewing the R7FS3A6783A01CFL#AA0 datasheet, R7FS3A6783A01CFL#AA0 pinout, R7FS3A6783A01CFL#AA0 application, or R7FS3A6783A01CFL#AA0 equivalent, key selection considerations include its 48-pin LQFP package, 48-MHz real-time performance with ECC-protected SRAM, dual watchdog timers (WDT/IWDT), 25-channel 14-bit ADC, and hardware-accelerated cryptographic functions (AES128/256, GHASH, TRNG).

Technical Context

This MCU implements an Armv7E-M architecture with DSP extensions and single-precision FPU, supporting deterministic real-time control in safety-critical embedded systems. It integrates dual watchdogs (WDT and independent IWDT), ECC on 16 KB of SRAM, and CAC for clock accuracy monitoring - enabling functional safety compliance in industrial and metering applications.

The device features a modular peripheral set including four SCI channels (UART/IIC/SPI), two SPI interfaces, two I2C buses, one CAN 2.0B controller, SSIE for audio, and dedicated analog resources: ADC14 (25 inputs), DAC12, dual ACMPLP comparators, four OPAMPs, and TSN temperature sensor - all accessible via 33 GPIOs in its 48-pin LQFP package.

Key Specifications

Pinout & Package

48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with 33 general-purpose I/O pins, 3 dedicated input-only pins, 4 5-V-tolerant pins, and integrated power/ground, clock, debug (SWD), and peripheral-specific signals (USB, SCI, SPI, I2C, ADC, CTSU, SLCDC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS3A6783A01CFL#AA0, the R7FS3A6773A01CFL#AA0 offers identical HMI capabilities at lower flash capacity and cost, while the R7FA6M2AF3CFP#AA0 trades SLCDC/CTSU for networking - making the former a true functional alternative and the latter a platform-shift option for connected systems.

Availability

R7FS3A6783A01CFL#AA0 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, building automation terminals, and portable diagnostic tools requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R7FS3A6783A01CFL#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 global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The R7FS3A6783A01CFL#AA0 belongs to the Renesas Synergy™ S3A6 microcontroller group - engineered specifically for high-integration, low-power human-machine interface applications requiring secure, reliable, and cost-effective control of segmented displays and capacitive touch interfaces.

FAQ

What is the maximum operating frequency of the R7FS3A6783A01CFL#AA0?

The R7FS3A6783A01CFL#AA0 operates at a maximum frequency of 48 MHz using its Arm Cortex-M4 core with FPU. This speed is achievable across the full -40°C to +105°C temperature range when powered within the specified 1.6–5.5 V VCC range and with appropriate clock source configuration (e.g., HOCO or PLL).

Does the R7FS3A6783A01CFL#AA0 support USB device mode with built-in transceiver?

Yes, the R7FS3A6783A01CFL#AA0 includes a USB 2.0 Full-Speed Module (USBFS) with an on-chip transceiver and integrated 3.3-V LDO regulator. It supports USB device mode (and host mode) compliant with USB Specification 2.0 and Battery Charging Specification 1.2 - eliminating the need for external USB PHY components in most implementations.

How many analog input channels does the ADC14 support on the R7FS3A6783A01CFL#AA0?

The R7FS3A6783A01CFL#AA0 supports up to 11 analog input channels for its 14-bit ADC14, as confirmed by Table 1.14 in the datasheet for the 48-pin package variant. These channels include dedicated pins and selectable internal sources such as temperature sensor output and reference voltage.

What is the role of the Segment LCD Controller (SLCDC) in the R7FS3A6783A01CFL#AA0?

The Segment LCD Controller (SLCDC) in the R7FS3A6783A01CFL#AA0 directly drives up to 34 segments × 8 commons using internal voltage boosting or external resistor-divider methods. It handles automatic waveform generation, contrast adjustment (16-step), and blinking - enabling standalone segmented display operation without external LCD drivers or timing logic.

Is the R7FS3A6783A01CFL#AA0 pin-compatible with other S3A6 group members in the same package?

Yes, the R7FS3A6783A01CFL#AA0 is software- and pin-compatible with other S3A6 microcontrollers in the 48-pin LQFP package (e.g., R7FS3A6773A01CFL#AA0), sharing identical pin functions, peripheral mappings, and electrical characteristics - enabling scalable design reuse across flash size variants.