Renesas R7FA6T2BD3CNB#AA1

Overview

R7FA6T2BD3CNB#AA1 from Renesas is an Arm® Cortex®-M23 microcontroller designed for ultra-low-power industrial and metering applications, featuring a 48 MHz CPU, 512-KB dual-bank flash, 48-KB SRAM with ECC/parity split, 24-bit Sigma-Delta ADC (4-channel), and integrated segment LCD controller driving up to 45 segments × 4 commons. It supports independent power supply RTC, AES-128/256 encryption, and operates from 1.6 V to 5.5 V across –40°C to +105°C.

For engineers reviewing the R7FA6T2BD3CNB#AA1 datasheet, R7FA6T2BD3CNB#AA1 pinout, R7FA6T2BD3CNB#AA1 application, or R7FA6T2BD3CNB#AA1 equivalent, key selection criteria include its 100-pin LQFP package, SDADC24 channel count (4 ch), SLCDC segment drive capability, security features (AES/TRNG), and low-voltage detection support on VCC, VRTC, and EXLVDVBAT pins.

Technical Context

The R7FA6T2BD3CNB#AA1 implements an Armv8-M architecture Cortex-M23 core with Memory Protection Unit (8 regions), debug via SW-DP, and DWT/MTB trace. Its memory subsystem includes bank-swap-capable dual-bank flash (256 KB × 2), 8-KB data flash (100k P/E cycles), and 48-KB SRAM partitioned as 32 KB parity + 16 KB ECC.

Analog subsystem integrates two independent A/D converters: a 12-bit SAR ADC (4 channels, internal reference/temperature sensor) and a 24-bit Sigma-Delta ADC (4 differential/single-ended inputs, programmable gain amplifier, PLL-derived clock). The SLCDC supports internal boosting, capacitor-split, or resistor-divider bias methods with waveform-A/B selection and blink control.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PLQP0100KB-B), 14 mm × 14 mm, 0.5 mm pitch, exposed pad not specified. Pin functions validated per Renesas R01DS0418EJ0130 Rev.1.30.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2A2AD3CFP, R7FA6T2BD3CNB#AA1 reduces SDADC24 channel count while retaining identical package, security, and power features-enabling BOM optimization in cost-sensitive metering. Versus R7FA4M2AD3CFM, it trades raw performance for integrated analog/HMI peripherals critical in resource-constrained displays.

Availability

R7FA6T2BD3CNB#AA1 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, portable medical devices, and building automation controllers requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature resilience.

Supply support for R7FA6T2BD3CNB#AA1 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 industrial, automotive, and enterprise applications.

The RA2A2 product line delivers ultra-low-power, secure Arm Cortex-M23 MCUs optimized for precision analog sensing, LCD-driven HMI, and functional safety in metering, industrial control, and portable instrumentation.

FAQ

What is the maximum operating frequency of the R7FA6T2BD3CNB#AA1?

The R7FA6T2BD3CNB#AA1 operates at a maximum CPU frequency of 48 MHz using the Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) at 48 MHz or via PLL multiplication from the sub-clock oscillator (32.768 kHz). System clocks for peripherals like SDADC24 and SLCDC are independently configurable to balance performance and power.

Does the R7FA6T2BD3CNB#AA1 support hardware-accelerated cryptography?

Yes, the R7FA6T2BD3CNB#AA1 includes a dedicated AES engine supporting ECB, CBC, CTR, GCM, CMAC, and CCM modes with 128-bit and 256-bit key lengths. It also integrates a True Random Number Generator (TRNG) for cryptographic key derivation. These features enable secure boot, firmware authentication, and encrypted data storage without software overhead.

How many analog input channels does the 24-bit SDADC24 support on the R7FA6T2BD3CNB#AA1?

The R7FA6T2BD3CNB#AA1's 24-bit Sigma-Delta A/D Converter (SDADC24) supports 4 differential or single-ended analog input channels, as confirmed by the part numbering scheme ('B' suffix denotes 4-channel SDADC24) and datasheet Table 1.12. Inputs are accessed via ANIP0–ANIP3 and ANIN0–ANIN3 pins with programmable gain amplifier stages.

What LCD segment drive capability does the R7FA6T2BD3CNB#AA1 provide?

The R7FA6T2BD3CNB#AA1's Segment LCD Controller (SLCDC) supports up to 45 segment outputs with 4 common outputs (or 41 segments with 8 commons), configurable via VL1–VL4, CAPH/CAPL, and COM0–COM7/SEG0–SEG44 pins. It supports internal voltage boosting, capacitor-split, and external resistor-divider bias methods, plus waveform-A/B selection for flicker reduction.

Is the R7FA6T2BD3CNB#AA1 qualified for extended temperature operation?

Yes, the R7FA6T2BD3CNB#AA1 is rated for operation from –40°C to +105°C ambient temperature, meeting industrial and metering environmental requirements. This rating applies to the 100-pin LQFP package (PLQP0100KB-B) and is validated across all core peripherals including SDADC24, SLCDC, RTC, and low-voltage detection circuits.