A31G122MM

The A31G122MM is a general-purpose microcontroller based on the ARM Cortex‑M0+ 32‑bit core running up to 40 MHz. It combines on‑chip Flash and SRAM with a broad set of peripherals and power/reset features for embedded control applications.

Designed for consumer and appliance applications such as smart door locks and air cleaners, the device delivers integrated analog, timing and display capabilities while supporting a wide supply range (1.8 V to 5.5 V) and extended temperature operation to meet industrial requirements.

Key Features

• Core ARM Cortex‑M0+ 32‑bit core running at up to 40 MHz for deterministic control and efficient firmware operation.
• Memory 32 Kbytes of on‑chip Flash and 6 Kbytes of SRAM for application code and data storage.
• Power and Reset Wide supply range (1.8 V to 5.5 V) with POR, LVR, LVI and integrated LDO; internal RC oscillator and multiple sleep modes reduce system power.
• Timers and PWM Multiple general‑purpose timers including 16‑bit timers, 32‑bit timers and a 16‑bit timer with 6‑channel PWM for motor and actuator control and timed events.
• Analog 12‑bit A/D converter (50 ksps) with 14 input channels suitable for sensor interfacing and analog monitoring.
• Interfaces and Communication Rich serial connectivity: 4×USART (UART + SPI), 2×UART, 3×I2C and LCD controller for system integration.
• Display Support Integrated LCD driver/controller supporting up to 8×39 segments with duty selectable, resistor bias and 16‑step contrast control for direct display interfaces.
• System Reliability 24‑bit watchdog timer, 16‑bit CRC generator (CRC‑CCITT, CRC‑16) and clock monitoring for improved system integrity and error detection.
• I/O and Drive Capability Up to 77 general‑purpose I/O pins; PD0–PD7 provide a combined sink capability up to 120 mA across those outputs.
• Package and Temperature Available in 80‑pin LQFP package and rated for extended temperature operation (‑40 °C to +105 °C).

Typical Applications

• Smart Door Locks — Control logic, secure user interface and sensor inputs using integrated timers, UART/I2C and LCD display support.
• Air Cleaners — Motor control, sensor acquisition and status display using PWM timers, 12‑bit ADC channels and LCD driver.
• General Embedded Control — Appliance and industrial control tasks requiring mixed analog/digital I/O, robust reset/watchdog features and flexible power operation.

Unique Advantages

• Highly integrated peripheral set: Combines timers, multi‑channel PWM, 12‑bit ADC, LCD controller and multiple serial interfaces to reduce BOM and simplify board design.
• Flexible power envelope: 1.8 V to 5.5 V supply range with POR, LVR/LVI and internal oscillator supports diverse power architectures and safe startup behavior.
• Display and HMI ready: On‑chip LCD driver with 16‑step contrast and resistor biasing removes the need for external display drivers in many UI designs.
• Robust system control: 24‑bit watchdog, clock monitoring and CRC generator help detect and recover from system faults.
• Multiple package and family options: Part of the A31G12x series offering memory and package scalability for design reuse across product variants.

Why Choose A31G122MM?

The A31G122MM positions itself as a compact, feature‑rich microcontroller for embedded control designs that require a balance of processing, mixed‑signal peripherals and display capability. With a Cortex‑M0+ core, 32 Kbytes Flash, 6 Kbytes SRAM and a wide set of timers, ADC channels and serial interfaces, it supports a broad range of consumer and appliance applications.

As a member of the A31G12x family from Abov Semiconductor, the A31G122MM offers designers a clear upgrade and variant path across memory sizes and package options while providing the system reliability and power flexibility needed for long‑lifecycle embedded products.

Request a quote or contact sales to discuss availability, lead times and pricing for the A31G122MM.