A31G123KU

The A31G123KU is a low-power microcontroller based on the ARM Cortex-M0+ core delivering a 32‑bit processing engine at up to 40 MHz. It integrates 64 Kbytes of Flash and 6 Kbytes of SRAM together with a broad set of on‑chip peripherals to support embedded control, appliance control and general-purpose applications such as smart door locks and air cleaners.

Designed for efficiency and system integration, the device supports a wide supply range (1.8–5.5 V), sleep and deep sleep modes, on‑chip power supervision and both internal and external clock options to help simplify power and clock system design.

Key Features

• Core ARM Cortex‑M0+ 32‑bit CPU running up to 40 MHz for deterministic embedded control and responsive interrupt handling.
• Memory 64 Kbytes of internal Flash program memory and 6 Kbytes of internal SRAM for code and data storage.
• Power and Clock Wide operating voltage range of 1.8–5.5 V, POR, LVR/LVI and an internal RC oscillator with support for external oscillators. Low‑power sleep and deep sleep modes reduce active energy consumption.
• Timers & PWM Multiple timers including 16‑bit timers, 32‑bit timers and a 16‑bit timer with 6‑channel PWM for motor control, timing and PWM-driven power stages; ten general purpose timers provide flexible timing and capture options.
• Analog 12‑bit ADC with up to 50 ksps conversion rate and multi‑channel inputs for sensor acquisition and analog system monitoring.
• Serial Interfaces Multiple serial ports on the A31G12x family and the A31G123KU variant provides USART and UART interfaces plus I2C channels to connect sensors, displays and external controllers.
• Display & LED Drive Integrated LCD driver/controller supporting up to 8×39 segments and LED/high‑current port capability (up to 120 mA sink across PD0–PD7) for user interfaces and direct LED drive.
• System Reliability & Security 16‑bit CRC generator (CRC‑CCITT/CRC‑16), 24‑bit watchdog timer and clock monitoring functions to improve system safety and integrity.
• Debug & Boot SWD debug interface and flexible boot logic with support for USART (UART + SPI) ISP for in‑system programming and debug.
• Package & Environment 32‑QFN package (5.0 × 5.0 × 0.75T–0.5 mm), 29 GPIOs on the KU variant and industrial operating temperature up to +105 °C.

Typical Applications

• Smart Door Locks — Control logic, user interface, and sensor interfaces for secure access systems using integrated timers, UART/I2C peripherals and LCD/LED drive.
• Air Cleaners & Home Appliances — Motor control, sensor acquisition and user display control leveraging PWM channels, 12‑bit ADC and LCD driver.
• General Purpose Embedded Control — Compact, low‑power control for sensor hubs, appliance controllers and standalone devices requiring robust I/O and mixed‑signal integration.

Unique Advantages

• Highly integrated peripheral set: Combines ADC, multiple timers, PWM, UART/USART and I2C plus CRC and WDT to reduce external components and BOM complexity.
• Flexible power and clocking: Operates across 1.8–5.5 V with internal RC and external oscillator support plus POR and LVR/LVI for reliable power supervision.
• Display and LED drive built in: On‑chip LCD controller and high‑current sink capability simplify user‑interface design without additional driver ICs.
• Compact, thermally capable package: 32‑QFN 5×5 mm package with industrial temperature rating to fit space‑constrained designs that require elevated temperature operation.
• Developer‑friendly system features: SWD debug, USART ISP and CRC support streamline development, validation and field firmware update workflows.
• Power‑aware operation: Sleep and deep sleep modes help lower system energy use for battery‑assisted or energy‑sensitive applications.

Why Choose A31G123KU?

The A31G123KU delivers a balanced combination of 32‑bit Cortex‑M0+ performance, on‑chip memory and a rich peripheral set tailored for appliance and general embedded control. Its integrated display and LED drivers, ADC, multiple timers and serial interfaces make it well suited for designs that need compact system integration and straightforward UI and sensor connectivity.

This variant is ideal for engineers building space‑constrained, industrial‑temperature applications that require deterministic control, robust power supervision and development‑friendly features such as SWD debug and USART ISP. The result is a scalable, integrated MCU option that reduces external component count and accelerates time to market.

Request a quote or contact sales to discuss pricing, volume availability and integration support for the A31G123KU.