Renesas R7FA6T2BB3CFP#AA1

Overview

R7FA6T2BB3CFP#AA1 from Renesas is an Arm® Cortex®-M23 microcontroller designed for ultra-low-power, high-precision sensing and human-machine interface applications. It features a 48 MHz CPU core, 512-KB dual-bank flash memory, 48-KB SRAM with ECC/parity, 24-bit Sigma-Delta A/D Converter (7-channel differential input), 12-bit ADC, independent power supply RTC, and integrated Segment LCD Controller supporting up to 45 segments × 4 commons - deployed in industrial metering, portable medical devices, and smart utility displays.

For engineers reviewing the R7FA6T2BB3CFP#AA1 datasheet, R7FA6T2BB3CFP#AA1 pinout, R7FA6T2BB3CFP#AA1 application, or R7FA6T2BB3CFP#AA1 equivalent, key selection criteria include its 24-bit SDADC resolution with programmable gain amplifier, low-voltage detection across VCC/VRTC/EXLVDVBAT rails, security features (AES-128/256, TRNG), and support for 100-pin LQFP packaging with 67 general-purpose I/Os including 3 input-only and 1 output-only pins.

Technical Context

The R7FA6T2BB3CFP#AA1 implements an Armv8-M architecture Cortex-M23 core with Memory Protection Unit (8 regions), debug via SW-DP, and deterministic real-time operation enabled by Event Link Controller (ELC) and Data Transfer Controller (DTC). Its analog subsystem integrates two independent A/D converters: a 12-bit SAR ADC (4 channels) and a 24-bit Sigma-Delta ADC (7-channel differential mode) with PLL-synchronized sampling at 7.813 kHz or 3.906 kHz.

Power management includes six Low Voltage Detection (LVD) modules, multiple clock sources (HOCO/MOCO/LOCO/SOSC/MOSC), and seven low-power modes. The SLCDC supports internal voltage boosting, capacitor-split, or external resistor division for LCD bias, with configurable waveform A/B and blink control - all operating from an independent VRTC supply.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PLQP0100KB-B), 14 mm × 14 mm, 0.5 mm pitch, exposed pad not specified. Pinout validated per Renesas R01DS0418EJ0130 Rev.1.30, Figure 1.3 (100-pin 7-ch variant).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with R7FA2A2AD3CFP, the R7FA6T2BB3CFP#AA1 adds TrustZone-based security partitioning and enhanced safety diagnostics (CAC, DOC, IWDT), while differing from R7FA6M2AF3CFP by prioritizing ultra-precision analog integration over raw compute - making it optimal for battery-operated, sensor-rich edge nodes requiring certified security and sub-µV measurement fidelity.

Availability

R7FA6T2BB3CFP#AA1 is available at Aetrix Electronics and suitable for industrial energy metering, portable medical sensors, smart utility displays, and industrial HMI panels requiring stable component supply across extended product lifecycles.

Supply support for R7FA6T2BB3CFP#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 automotive, industrial, and IoT markets.

The RA2A2 group - including R7FA6T2BB3CFP#AA1 - was engineered for ultra-low-power, high-precision sensing and human-machine interface applications in harsh industrial environments, emphasizing analog accuracy, security, and long-term reliability.

FAQ

What is the maximum sampling rate of the 24-bit Sigma-Delta ADC in R7FA6T2BB3CFP#AA1?

The R7FA6T2BB3CFP#AA1 SDADC24 supports two programmable sampling rates: 7.813 kHz and 3.906 kHz, both derived from a PLL-multiplied 32.768 kHz sub-clock oscillator. These rates are fixed per configuration and apply across all 7 differential input channels. The R7FA6T2BB3CFP#AA1 datasheet specifies these values in Table 1.8 and Section 1.5.

Does R7FA6T2BB3CFP#AA1 support TrustZone security features?

Yes, the R7FA6T2BB3CFP#AA1 implements Arm TrustZone for Armv8-M, enabling hardware-enforced secure/non-secure world separation. This includes secure boot, isolated memory regions, and protected peripheral access - confirmed in the R01DS0418EJ0130 datasheet Section 1.11 (Security) and feature table on page 1.

What LCD segment count does R7FA6T2BB3CFP#AA1 support in 4-common mode?

In 4-common mode (8-com disabled), the R7FA6T2BB3CFP#AA1 SLCDC supports up to 45 segment outputs (SEG0–SEG44) and 4 common outputs (COM0–COM3), as defined in Table 1.9 and verified in Figure 1.3 pin assignment diagram. This configuration enables alphanumeric or custom symbol displays with minimal external components.

Is R7FA6T2BB3CFP#AA1 pin-compatible with other RA2A2 series MCUs?

R7FA6T2BB3CFP#AA1 shares the 100-pin LQFP package (PLQP0100KB-B) and pinout with R7FA2A2AD3CFP and R7FA2A2BD3CFP, as shown in Figures 1.3 and 1.4 of the R01DS0418EJ0130 datasheet. However, functional pin mapping differs for SDADC24 inputs and SLCDC outputs between 7-channel and 4-channel variants - requiring schematic review before substitution.

What is the operating voltage range for R7FA6T2BB3CFP#AA1?

The R7FA6T2BB3CFP#AA1 operates from 1.6 V to 5.5 V on the VCC supply rail, with separate voltage domains for analog (AVCC/AVSS), RTC (VRTC), and external LVD detection (EXLVDVBAT, EXLVD). This wide range supports direct battery operation (e.g., 3.0 V Li-ion or 4.5 V alkaline packs) and compatibility with legacy 5 V systems.