A31G123KY

The A31G123KY is a 32-bit microcontroller based on the ARM Cortex‑M0+ core providing 64 Kbytes of Flash and 6 Kbytes of SRAM. Designed for embedded control applications, it combines a full complement of timers, PWM channels, a 12‑bit ADC and display support to address user interfaces, motor and sensor control, and appliance control use cases.

Operating from 1.8 V to 5.5 V and rated across a wide temperature range, the A31G123KY delivers a balanced combination of performance, system integration and reliability for cost‑sensitive designs in consumer and industrial segments.

Key Features

• Core – ARM Cortex‑M0+ 32‑bit processor running up to 40 MHz for efficient control and responsive interrupt handling.
• Memory – 64 Kbytes of internal FLASH and 6 Kbytes of SRAM to host application code and runtime data.
• Power & Voltage – Wide operating supply range from 1.8 V to 5.5 V with integrated LDO, POR (Power-On Reset), LVR (Low Voltage Reset) and LVI (Low Voltage Interrupt).
• Timers & PWM – Ten general purpose timers including a 16‑bit timer with 6‑channel PWM for motor control, motor drivers and precise timing tasks.
• Analog – 12‑bit ADC (up to 50 ksps) with multiple input channels for sensor interfacing and analog measurement.
• Interfaces & Connectivity – Multiple serial interfaces including I2C, UART and USART plus flexible USART (UART + SPI) configurations for peripheral and host communications.
• Display & GPIO – Integrated LCD driver supporting segment displays (up to 8×39 segments) with resistor bias and 16‑step contrast control; 29 general purpose I/O pins with high current sink capability on selected ports.
• System Reliability & Security – 24‑bit Watchdog Timer, POR, clock monitoring, and 16‑bit CRC generator (CRC‑16/CCITT) to support data integrity and robust operation.
• Clocking & Debug – Internal RC oscillator plus external clock option and SWD debug interface for development and production programming.
• Package & Temperature – Surface‑mount 32‑QFN (5×5×0.85T‑0.5 mm) package and industrial temperature grade available (‑40 °C to +105 °C).

Typical Applications

• Smart Door Locks – Handles user interface, motor control and secure periodic monitoring with on‑chip timers, PWM channels and watchdog functions.
• Air Cleaners & Home Appliances – Controls fan motors, reads environmental sensors with the 12‑bit ADC, and drives status displays using the integrated LCD controller.
• General Purpose Embedded Control – Suitable for sensor hubs, control panels and small appliance controllers requiring a compact MCU with mixed‑signal peripherals.

Unique Advantages

• High integration reduces BOM: On‑chip Flash, SRAM, ADC, PWM, LCD driver and multiple serial interfaces minimize external components and simplify board design.
• Flexible power and I/O: Wide 1.8–5.5 V supply range and 29 GPIOs make the device adaptable to varied system voltages and peripheral requirements.
• Targeted control peripherals: Ten timers and a 6‑channel PWM deliver fine control for motor and timing applications without additional timer ICs.
• Display and UI support: Built‑in LCD driver with contrast control enables compact, low‑cost user interfaces without external display drivers.
• Designed for reliable operation: Integrated POR, LVR, LVI, watchdog timer and CRC generator help maintain system integrity in long‑running embedded applications.
• Development and production support: SWD debug interface and ISP options via USART simplify development, programming and firmware updates.

Why Choose A31G123KY?

The A31G123KY balances processing capability, peripheral integration and rugged operating range to serve a broad set of embedded control applications. Its combination of Cortex‑M0+ performance, integrated analog and display features, and robust system supervision functions make it a practical choice for designers seeking a compact, feature‑rich MCU in a 32‑QFN package.

Ideal for developers of consumer appliances, smart access devices and general control systems, the A31G123KY delivers a cost‑effective platform that scales within the A31G12x family and is supported by ABOV Semiconductor documentation and resources.

Request a quote or contact sales for pricing, lead times and technical availability for the A31G123KY.