Renesas R7F123FMG4AFB-C#BA0

Overview

R7F123FMG4AFB-C#BA0 from Renesas Electronics is a 16-bit RL78/F23 single-chip microcontroller featuring 256 KB flash memory, 20 KB RAM, and operating at up to 32 MHz. It integrates a 12-bit ADC (24 channels), 16-bit timer arrays (TAU), UART/SPI/I²C interfaces, and operates from 1.6 V to 5.5 V supply. It targets low-power industrial sensing and motor control applications requiring integrated analog peripherals and robust real-time execution.

For engineers reviewing the R7F123FMG4AFB-C#BA0 datasheet, R7F123FMG4AFB-C#BA0 pinout, R7F123FMG4AFB-C#BA0 application, or R7F123FMG4AFB-C#BA0 equivalent, key selection criteria include its 80-pin LQFP package, on-chip debug interface, EEPROM emulation capability, and support for IEC 60730 Class B functional safety compliance via hardware CRC and self-test features.

Technical Context

The R7F123FMG4AFB-C#BA0 implements the RL78 CPU core with 16-bit CISC architecture, supporting 100+ instructions and 3-stage pipeline execution. It includes a dedicated 16-bit multiplier/divider unit and supports both linear and banked memory addressing modes across its 256 KB flash and 20 KB SRAM.

Peripherals are organized into autonomous subsystems: the 12-bit ADC supports scan mode with hardware-triggered conversion and result buffering; the TAU timer module provides complementary PWM outputs with dead-time insertion; and the serial array unit (SAU) delivers configurable UART/SPI/I²C operation with independent clock sources and error detection logic.

Key Specifications

Pinout & Package

The R7F123FMG4AFB-C#BA0 is housed in an 80-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad, rated for industrial temperature range (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R7F123FLG4AFB-C#BA0, the R7F123FMG4AFB-C#BA0 offers 64 KB more flash and 4 KB more RAM for extended feature sets; versus R7F124FMJ4AFB-C#AA0, it trades LIN capability and memory headroom for lower cost and identical pinout compatibility in legacy F23-based designs.

Availability

R7F123FMG4AFB-C#BA0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and home appliance control requiring stable component supply across production lifecycles.

Supply support for R7F123FMG4AFB-C#BA0 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 IoT markets.

The RL78/F23 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, safety-aware embedded control applications including motor drives, sensors, and white goods.

FAQ

What is the maximum operating frequency of the R7F123FMG4AFB-C#BA0?

The R7F123FMG4AFB-C#BA0 operates at a maximum CPU clock frequency of 32 MHz, achievable using the on-chip high-speed oscillator (HOCO) or external crystal/resonator sources. This frequency is fully supported across the industrial temperature range (−40°C to +85°C) and enables sub-microsecond interrupt response times essential for real-time motor control loops. The R7F123FMG4AFB-C#BA0 includes automatic clock fail-safety switching to backup oscillators if the primary source fails.

Does the R7F123FMG4AFB-C#BA0 support IEC 60730 Class B compliance?

Yes, the R7F123FMG4AFB-C#BA0 includes hardware features required for IEC 60730 Class B compliance, including RAM parity checking, flash read-after-write verification, clock frequency measurement, and a hardware CRC calculator. These capabilities are documented in Renesas Application Note R01AN4233EU, and the R7F123FMG4AFB-C#BA0 is qualified for use in safety-critical home appliance control applications when implemented per the recommended diagnostic software library.

What package type and pin count does the R7F123FMG4AFB-C#BA0 use?

The R7F123FMG4AFB-C#BA0 uses an 80-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. This package matches the RL78/F23 80-pin product group defined in the R01UH0944E Hardware User's Manual and supports all 69 general-purpose I/O pins plus dedicated power, reset, and debug interface signals. The thermal pad enhances heat dissipation during sustained 32 MHz operation.

Can the R7F123FMG4AFB-C#BA0 emulate EEPROM without external components?

Yes, the R7F123FMG4AFB-C#BA0 supports on-chip EEPROM emulation using its 256 KB flash memory and built-in flash control logic. Renesas provides the Flash Self Programming Library (FSPL) and sample code to implement wear-leveling, atomic write operations, and background programming - enabling reliable non-volatile data storage without external EEPROM or FRAM components.

What debug interface does the R7F123FMG4AFB-C#BA0 support?

The R7F123FMG4AFB-C#BA0 supports the Renesas FINE (Full In-circuit Emulator) debug interface over SWD (Serial Wire Debug) pins, compatible with E2 Emulator and E2 Lite tools. This interface enables real-time breakpoints, memory inspection, register view, and flash programming without requiring dedicated trace pins - preserving I/O resources for application use while maintaining full visibility into runtime behavior.