Renesas R7FA6T2BD3CFL#BA1

Overview

R7FA6T2BD3CFL#BA1 from Renesas is an Arm® Cortex®-M23 microcontroller operating at 48 MHz, featuring 512-KB dual-bank flash memory, 48-KB SRAM with ECC/parity support, and integrated 24-bit Sigma-Delta A/D Converter (SDADC24) with 4-channel differential input capability. It includes a segment LCD controller supporting up to 45 segments × 4 commons, independent power supply RTC, and hardware AES-128/256 encryption - deployed in industrial metering and low-power HMI systems.

For engineers reviewing the R7FA6T2BD3CFL#BA1 datasheet, R7FA6T2BD3CFL#BA1 pinout, R7FA6T2BD3CFL#BA1 application, or R7FA6T2BD3CFL#BA1 equivalent, key selection criteria include SDADC24 channel count (4 ch), LQFP-100 package with 67 GPIOs, 5-V-tolerant I/O pins, and support for secure boot via on-chip TRNG and AES.

Technical Context

This MCU implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting 8 regions, debug via SW-DP, and dual-bank flash enabling safe firmware updates. Its analog subsystem integrates two independent ADCs: a 12-bit SAR ADC (4 channels) and a 24-bit Sigma-Delta ADC (4 differential channels) with programmable gain amplifier and internal reference voltage generation.

Power management includes seven low-voltage detectors (LVD0–LVD_VRTC), multiple clock sources (HOCO/MOCO/LOCO/SOSC/MOSC), and dedicated IWDT with independent 15-kHz oscillator. The Event Link Controller (ELC) enables direct peripheral-to-peripheral triggering without CPU intervention, critical for deterministic real-time response in metering applications.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), rated for -40°C to +105°C operation. Pin count includes 67 general-purpose I/Os, 3 input-only pins, 1 output-only pin, 5-V-tolerant I/Os (2 pins), and RTCIC pins with 5-V tolerance (3 pins).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA6T2BD3CFL#BA1, R7FA2A2AD3CFP offers more SDADC channels in identical packaging, while R7FA6T2AD3CFL#BA1 adds secure boot ROM and PSA-certified firmware validation - both require no PCB changes but differ in analog scalability and security assurance level.

Availability

R7FA6T2BD3CFL#BA1 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, and battery-powered utility monitoring requiring stable component supply, long-term lifecycle support, and automotive-grade reliability under extended temperature conditions.

Supply support for R7FA6T2BD3CFL#BA1 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, and power solutions for industrial, automotive, and IoT markets.

The RA2A2 group - including R7FA6T2BD3CFL#BA1 - is designed for ultra-low-power, high-integrity applications such as utility metering and industrial HMI, integrating precision analog, secure execution, and robust real-time control in a single chip.

FAQ

What is the maximum operating frequency and core architecture of the R7FA6T2BD3CFL#BA1?

The R7FA6T2BD3CFL#BA1 features an Arm Cortex-M23 core compliant with the Armv8-M architecture, operating at a maximum frequency of 48 MHz. It includes an Arm Memory Protection Unit (MPU) with 8 configurable regions and supports debug via Serial Wire Debug (SW-DP). This architecture delivers deterministic real-time performance with enhanced security features essential for certified metering applications.

How many SDADC24 channels does the R7FA6T2BD3CFL#BA1 support, and what are their input configurations?

The R7FA6T2BD3CFL#BA1 supports 4 differential channels for its 24-bit Sigma-Delta A/D Converter (SDADC24), implemented as ANIP0–ANIP3 and ANIN0–ANIN3 pin pairs. Each channel supports programmable gain (1×–128×), selectable sampling rates (3.906 kHz or 7.813 kHz), and both differential and single-ended input modes - optimized for high-accuracy current transformer or shunt-based sensing.

Does the R7FA6T2BD3CFL#BA1 include hardware encryption, and which algorithms are supported?

Yes, the R7FA6T2BD3CFL#BA1 integrates a dedicated hardware AES engine supporting ECB, CBC, CTR, GCM, CMAC, and CCM cipher modes with 128-bit and 256-bit key lengths. It also includes a True Random Number Generator (TRNG) compliant with NIST SP 800-90B. These features enable secure boot, firmware authentication, and TLS acceleration without CPU overhead - critical for PSA-certified designs.

What LCD driving capability does the R7FA6T2BD3CFL#BA1 provide, and how is it configured?

The R7FA6T2BD3CFL#BA1 integrates a Segment LCD Controller (SLCDC) supporting up to 45 segment outputs × 4 common outputs or 41 segments × 8 commons. Configuration options include internal voltage boosting, capacitor split, or external resistor division methods. VL1–VL4 and CAPH/CAPL pins allow flexible bias generation, and waveform A/B selection enables flicker-free display operation.

What power supply and temperature specifications apply to the R7FA6T2BD3CFL#BA1?

The R7FA6T2BD3CFL#BA1 operates across a wide voltage range of 1.6 V to 5.5 V on VCC and supports independent VRTC supply for RTC functionality. It is qualified for industrial temperature operation from −40°C to +105°C in its 100-pin LQFP package. Six integrated low-voltage detectors (LVD0–LVD_VRTC) provide configurable thresholds for system-level brownout protection and battery monitoring.