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The R5F111MFAFB is a 16-bit microcontroller (MCU) belonging to the RL78/L1x series, which is mainly targeted at low-power, highly integrated embedded applications, such as industrial control, consumer electronics, medical equipment and automotive electronics. The chip adopts the RL78 core with 96KB Flash memory, 10KB RAM, and supports a variety of communication interfaces. It is suitable for application scenarios requiring LCD driver, low voltage detection (LVD), and high-precision analogue signal processing.

R5F111MFAFB Key Features

1. Core and Performance

CPU: 16-bit RL78 core, maximum running frequency 24MHz, supports low-power mode (HALT/STOP).

Storage:

96KB Flash (programme memory)

10KB SRAM (Running Memory)

8KB Data Flash (EEPROM analogue memory)

Low-power design: operating voltage 1.6V ~ 3.6V, suitable for battery-powered devices

2. Peripherals and Interfaces

Communication Interface:

4 x CSI (serial communication interface)

5×I²C, 4×UART/USART

1×LIN (for automotive communication)

Analogue peripherals:

12-bit ADC (7 channels)

8-bit DAC (2 channels)

Timer & PWM:

8×16-bit timer

7×PWM output (support motor control)

LCD driver: supports 40×8 or 44×4 segment LCD for human-machine interface (HMI)

3. Package and electrical characteristics

Package: 80-LQFP (12×12mm, 0.5mm pin pitch)

Operating temperature: -40°C ~ +85°C (industrial grade)

Safety Features:

Low Voltage Detection (LVD)

Power-On Reset (POR)

Watchdog Timer (WDT)

R5F111MFAFB Typical Application Areas

Industrial control: PLC, sensor interface, motor drive.

Consumer electronics: smart home, portable medical devices (e.g. oximeter).

Automotive electronics: Body Control Module (BCM), LIN bus node.

HMI devices: segment code LCD display driver.

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