A31G111KN

The A31G111KN is an ARM Cortex-M0+ based microcontroller delivering a 32-bit core at up to 40 MHz with 16 Kbytes of Flash and 4 Kbytes of SRAM. It targets compact embedded applications such as home appliances, smart door locks, air cleaners and other general-purpose designs that require integrated analog, timer and display control.

Designed for flexible power and system management, the device supports a wide operating voltage range (1.8–5.5 V), POR/LVR/LVI protection, internal RC oscillator and sleep/deep-sleep modes to help optimize system power and reliability.

Key Features

• Core  ARM Cortex-M0+ 32-bit core running up to 40 MHz for deterministic control and efficient code execution.
• Memory  16 Kbytes of on-chip Flash and 4 Kbytes of internal SRAM for program and data storage in compact designs.
• Power and Clock  Wide supply range (1.8–5.5 V), internal RC oscillator plus external clock support, POR, LVR and LVI for robust power management.
• Timers and PWM  Multiple timers including 16-bit and 32-bit timers, a 16-bit timer with 6-channel PWM and 3-phase PWM capability for motor control and timing functions.
• Analog  12-bit ADC with device-specific channel allocation (A31G111KN: 5-channel) for sensor interfacing and signal monitoring.
• Serial Interfaces  Multiple serial ports including USART (supporting UART and SPI modes) and I2C interfaces to connect sensors, displays and peripherals.
• Display and LED Drive  Integrated LCD driver (up to 8 × 23 segments with contrast control) and LED/high-current port support with up to 120 mA sink capability on designated pins for direct display and indicator drive.
• System Reliability  16-bit CRC generator (CRC-16/CRC-CCITT), 24-bit watchdog timer and clock monitoring to help ensure system integrity.
• Low-Power Modes  Support for sleep and deep-sleep modes to reduce power consumption in battery-powered or energy-sensitive applications.
• Package and Temperature  Available in a 32-LQFP package with an operating temperature range of −40 to +105 °C for industrial-grade deployments.

Typical Applications

• Home Appliances  Control and user-interface tasks such as display management, timer functions and sensor inputs for appliances like air cleaners.
• Smart Door Locks  Secure embedded control with serial interfaces for peripherals, ADC inputs for sensors and low-power sleep modes for extended battery life.
• Air Cleaners and HVAC Controls  Sensor acquisition via 12-bit ADC, PWM-driven fan control and LCD/LED status display integration.
• General-Purpose Embedded Systems  Compact control nodes requiring integrated timers, serial connectivity and reliability features in a small 32-pin LQFP package.

Unique Advantages

• Compact, integrated control  On-chip Flash, SRAM, ADC, timers, display driver and serial interfaces reduce external BOM and simplify board design.
• Broad supply flexibility  1.8–5.5 V operating range accommodates a wide set of system power architectures and battery-centric designs.
• Direct display and LED drive  Built-in LCD controller and high-current sink capability let designers drive displays and indicators without large external drivers.
• Robust system safeguards  POR, LVR, LVI, watchdog timer and clock monitoring features help maintain reliable operation in variable conditions.
• Industrial temperature support  −40 to +105 °C rating enables deployment in demanding environmental conditions.

Why Choose A31G111KN?

The A31G111KN combines a capable Cortex-M0+ core with tightly integrated peripherals—timers, 12-bit ADC, LCD/LED drive, multiple serial interfaces and system reliability features—making it well suited for compact embedded products that require control, human interface and sensor connectivity. Its wide input voltage range, low-power modes and industrial temperature rating provide design flexibility for battery-powered and industrial applications.

This device is targeted at engineers seeking a small-package microcontroller that balances performance, peripheral integration and system-level protections to reduce component count and speed time-to-market.

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