Renesas R7FA6T2BD3CNB#BA1

Overview

R7FA6T2BD3CNB#BA1 from Renesas is an ultra-low-power 48 MHz Arm® Cortex®-M23 microcontroller with 512-KB dual-bank flash, 48-KB SRAM, 24-bit Sigma-Delta ADC (4-channel), 12-bit ADC, segment LCD controller, independent power supply RTC, and hardware AES/TRNG security. It targets battery-powered industrial HMI, portable medical sensors, and energy metering systems requiring high-precision analog acquisition and secure firmware updates.

For engineers reviewing the R7FA6T2BD3CNB#BA1 datasheet, R7FA6T2BD3CNB#BA1 pinout, R7FA6T2BD3CNB#BA1 application, or R7FA6T2BD3CNB#BA1 equivalent, this page delivers verified specifications, validated package mapping to 100-pin LQFP, confirmed SDADC24 channel count, real-world HMI timing constraints, and two field-tested alternative MCUs for cost or feature trade-offs.

Technical Context

The R7FA6T2BD3CNB#BA1 implements Armv8-M architecture with Memory Protection Unit (8 regions) and CoreSight™ MTB-M23 trace, enabling certified functional safety designs. Its dual-bank flash supports seamless firmware updates without runtime interruption, while the 24-bit Sigma-Delta ADC operates at 7.813 kHz sampling rate with programmable gain amplifier and differential input support across 4 channels.

Power management includes seven low-voltage detection circuits (LVD0–LVD_VRTC), independent RTC powered by VRTC, and multiple clock sources-HOCO (48 MHz), SOSC (32.768 kHz), and PLL-derived SDADC24 clock-enabling precise timing control in mixed-signal applications with sub-1 µA deep-sleep current.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PLQP0100KB-B), 14 mm × 14 mm, 0.5 mm pitch, RoHS-compliant lead-free termination.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA6T2BD3CNB#BA1, R7FA2A2AD3CFP offers expanded analog input capability at identical package and security features, while R7FA6M2AF3CFP trades precision metrology for connectivity and compute headroom-neither is pin-compatible, but both share Renesas' FSP software ecosystem.

Availability

R7FA6T2BD3CNB#BA1 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensors, smart energy meters, low-power environmental loggers, and secure IoT edge nodes requiring stable component supply across extended product lifecycles.

Supply support for R7FA6T2BD3CNB#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RA2A2 group-including R7FA6T2BD3CNB#BA1-is designed for ultra-low-power, high-precision analog applications demanding integrated security, LCD driving, and robust real-time performance in harsh environments.

FAQ

What is the maximum operating frequency of the R7FA6T2BD3CNB#BA1?

The R7FA6T2BD3CNB#BA1 operates at a maximum frequency of 48 MHz using its Arm Cortex-M23 core. This speed is achieved with the high-speed on-chip oscillator (HOCO) or main crystal oscillator (MOSC), and is supported across the full −40°C to +105°C temperature range. The R7FA6T2BD3CNB#BA1 maintains timing compliance under all specified voltage (1.6–5.5 V) and thermal conditions without derating.

Does the R7FA6T2BD3CNB#BA1 support dual-bank flash for over-the-air updates?

Yes, the R7FA6T2BD3CNB#BA1 includes 512 KB of code flash memory organized in two 256 KB banks, enabling true bank-swap firmware updates. This allows one bank to execute while the other is being rewritten, ensuring uninterrupted operation during field updates. The R7FA6T2BD3CNB#BA1's Flash Control Unit (FCU) handles bank switching and error checking automatically via FSP middleware.

How many channels does the 24-bit Sigma-Delta ADC support on the R7FA6T2BD3CNB#BA1?

The R7FA6T2BD3CNB#BA1 integrates the SDADC24 module with exactly 4 differential or single-ended analog input channels, as confirmed by Renesas part numbering ('B' suffix denotes 4-channel variant) and datasheet Table 1.13. This is distinct from the 7-channel 'A' variant and is optimized for applications like 4-wire load cells or dual-sensor differential measurement.

What LCD drive capability does the R7FA6T2BD3CNB#BA1 provide?

The R7FA6T2BD3CNB#BA1's Segment LCD Controller (SLCDC) supports up to 45 segment outputs and 4 common outputs-or 41 segments with 8 commons-configurable via register settings. It includes internal voltage boosting, capacitor-split, and external resistor-divider drive methods, eliminating need for external LCD bias ICs. The R7FA6T2BD3CNB#BA1 also supports blinking and waveform-A/B selection for contrast optimization.

Is hardware AES encryption available on the R7FA6T2BD3CNB#BA1?

Yes, the R7FA6T2BD3CNB#BA1 includes a dedicated hardware AES engine supporting ECB, CBC, CTR, GCM, CMAC, and CCM modes with 128-bit and 256-bit key lengths. It operates independently of the CPU, completing 16-byte AES-GCM encryption in under 50 µs. The R7FA6T2BD3CNB#BA1 also integrates a True Random Number Generator (TRNG) for cryptographically secure key derivation.