Nuvoton’s automotive MCU series delivers outstanding reliability, rich feature integration, and automotive-grade qualification, making it an ideal choice for in-vehicle electronic applications. The M0A23, NUC131U, M2A23, and M481U series cover a full range of needs from basic control to high-performance processing, providing comprehensive support for automotive electronic systems.

M0A23 Series: Cost-Effective Automotive Basic Control MCU

Based on the ARM Cortex-M0 core and running at 48 MHz, the M0A23 series offers a precise feature set and strong cost efficiency for automotive basic control applications.

Key Features:

• On-chip 32 KB Flash and 4 KB SRAM
• Integrated 1× CAN 2.0B and 2× LIN interfaces
• 12-bit ADC module (17 channels)
• Four 32-bit timers supporting six PWM outputs, suitable for small motor control
• Multiple communication interfaces including USCI and UART
• Wide operating voltage range: 2.5V to 5.5V
• AEC-Q100 Grade 1 qualified, operating temperature range: -40°C to 125°C

Typical Applications: HVAC air-flap control, power window motor drive, seat position adjustment, interior lighting systems, windshield wiper motor control, and other basic body electronics modules.

NUC131U Series: Compact Automotive General-Purpose Control MCU

Based on the ARM Cortex-M0 core and operating at 50 MHz, the NUC131U series combines a compact design with practical configuration for small to mid-scale automotive control needs.

Key Features:

• On-chip 68 KB Flash and 8 KB SRAM
• Integrated 1× CAN 2.0B and 3× LIN interfaces
• 12-bit ADC module (8 channels)
• Four 32-bit timers supporting 12 channels of 16-bit PWM output
• Rich peripherals including 6× UART, 1× SPI, and 2× I2C
• Wide operating voltage range: 2.5V to 5.5V
• AEC-Q100 Grade 2 qualified, operating temperature range: -40°C to 105°C

Typical Applications: Automotive lighting control (turn signals, ambient lighting), small DC motor drives, door lock control modules, auxiliary seat control, and in-vehicle sensor nodes.

M2A23 Series: Multi-Function Automotive Networking and Control Core

Based on the ARM Cortex-M23 core and running at 72 MHz, the M2A23 series offers a rich, practical feature set, making it a strong choice for mid- to high-end automotive control applications.

Key Features:

• On-chip 256 KB Flash and 24 KB SRAM
• Integrated 3× CAN FD and 1× LIN, enabling flexible in-vehicle network topology and facilitating network redundancy design
• High-performance 12-bit ADC module (16 channels)
• Six enhanced PWM channels and six basic PWM channels with synchronous control and dead-time configuration, supporting precise motor drive control for applications such as power liftgate motors and window motors
• Comprehensive communication interfaces including USCI, UART, SPI, and I2C
• Nuvoton-exclusive dual LLSI interfaces (ARGB LED strip control interfaces) to support a wide range of interior/exterior lighting control and intelligent ambient lighting adjustment
• AEC-Q100 Grade 1 qualified, operating temperature range: -40°C to 125°C

Typical Applications: Body Control Modules (BCM) coordinating multi-subsystem communication and control, automotive gateways forwarding data between different networks, multi-device collaborative control in intelligent cockpits, smart HVAC adjustment and monitoring, automotive lighting system control, ambient lighting, and other applications—especially where both network communication and precise control are required.

M481U Series: Key Enabler for High-Performance Intelligent Automotive Systems

Based on the ARM Cortex-M4 core and running up to 192 MHz with an FPU, the M481U series provides strong compute capability for complex intelligent automotive systems.

Key Features:

• On-chip 256 KB Flash and 128 KB SRAM to support complex code storage and data buffering
• High-performance 12-bit ADC with 5 MSPS sampling rate, plus a DAC module for high-precision analog signal acquisition and output
• Advanced multi-channel PWM timers supporting complex motor control algorithms and power management strategies
• Integrated high-speed interfaces including USB 2.0 and CAN 2.0B for high-speed data exchange with in-vehicle smart devices, head units, and external networks
• Hardware encryption engine and secure boot to comprehensively protect data security and the boot process
• AEC-Q100 Grade 3 qualified, operating temperature range: -40°C to 85°C

Typical Applications: Efficient processing for multimedia playback and navigation in in-vehicle infotainment systems; serving as the front-end core control unit for ADAS to perform complex perception and decision computation; providing precise control compute for electric power steering; and ensuring stable, efficient operation of on-board chargers (OBU) in high-performance application scenarios—an essential component for modern intelligent automotive electronics systems.

Common Series Features

• Fully AEC-Q100 qualified to ensure reliable operation under extreme temperature and vibration conditions
• Wide operating voltage range to accommodate automotive power supply fluctuations
• Comprehensive hardware safety mechanisms including secure boot, independent watchdog timer, low-voltage detection, and error correction code (ECC)
• Extensive development toolchains and software libraries to accelerate product development and validation
• Multiple package options to meet different installation space requirements

With a clearly tiered performance portfolio, Nuvoton’s automotive MCU series provides a one-stop solution from basic control to intelligent systems, helping automotive electronics manufacturers build safer, smarter, and more reliable in-vehicle electronic systems.