A31G122RM

The A31G122RM is a highly integrated 32-bit microcontroller based on the ARM Cortex-M0+ core, featuring 32 Kbytes of internal Flash and 6 Kbytes of SRAM. Designed for embedded control, human‑machine interface and sensor-driven applications, it combines a broad set of on‑chip peripherals with flexible power management and a wide supply voltage range.

With a 40 MHz core, multi-channel ADC, extensive timer resources, LCD and LED drive capability, and low‑power sleep modes, the A31G122RM is positioned for smart home, appliance and general‑purpose embedded systems that require integration, deterministic control and low standby power.

Key Features

• Core  ARM Cortex‑M0+ 32‑bit core running up to 40 MHz for efficient control and deterministic real‑time performance.
• Memory  32 Kbytes on‑chip Flash program memory and 6 Kbytes SRAM for application code and runtime data.
• Power and Clock  Wide supply range from 1.8 V to 5.5 V, integrated LDO and POR, plus internal and external oscillator support for flexible clocking and system power designs.
• Timers and PWM  Multiple timers including ten general‑purpose timers, 16‑bit timers with 6‑channel PWM and 32‑bit timers, plus 3‑phase 16‑bit PWM support for motor or power applications.
• Analog  12‑bit ADC with 14 input channels and 50 ksps sampling rate for multi‑sensor monitoring and precise analog measurement.
• Interfaces and Connectivity  Rich serial interfaces: USART/UART and SPI combinations (family supports up to 4x USART; A31G122RM provides 3xUSART, 2xUART) and 3x I2C for sensor, display and peripheral communications.
• Display and LED Drive  On‑chip LCD driver/controller (up to 8×39 segments) and LED high‑current port capability with up to 120 mA sink on eight pins (PD0–PD7) for user interface and status indicators.
• System Reliability  16‑bit CRC generator (CRC‑CCITT/CRC‑16), 24‑bit Watchdog Timer and clock monitoring features to support data integrity and fault recovery.
• Low Power Modes  Support for SLEEP and DEEP‑SLEEP modes to minimize power consumption in standby and battery‑powered designs.
• Package and I/O  61 general I/O pins available in a 64‑LQFP package suitable for surface‑mount assembly.
• Operating Range  Industrial temperature operation to +105 °C (−40 °C to +105 °C) for demanding environments.
• Debug and In‑System Programming  SWD debug interface and USART ISP support for development, programming and field updates.

Typical Applications

• Smart door locks  Secure control and user interface tasks using integrated timers, GPIO, LCD/LED drive and low‑power modes for battery operation.
• Air cleaners  Sensor interfacing, motor control and user display functions enabled by multi‑channel ADC, PWM timers and LCD driver.
• General‑purpose embedded systems  Compact control modules requiring integrated peripherals, multi‑voltage support and robust temperature range for home and industrial products.

Unique Advantages

• Highly integrated peripheral set: Consolidates ADC, LCD driver, multiple timers, CRC and serial interfaces to reduce BOM and simplify board design.
• Flexible power and clocking: 1.8 V–5.5 V supply range with internal/external oscillator options and LDO/POR for robust system power management.
• Strong I/O and display capability: 61 GPIOs plus LCD and high‑current LED drive (up to 120 mA on PD0–PD7) for rich user interfaces without external drivers.
• Real‑time control resources: Multiple 16‑bit and 32‑bit timers, PWM channels and 3‑phase PWM support for motor and power control tasks.
• Industrial temperature support: −40 °C to +105 °C operation for applications exposed to wide thermal ranges.
• Development and field support: SWD debug interface and USART ISP capability for streamlined development and in‑field programming.

Why Choose A31G122RM?

The A31G122RM delivers a balanced combination of ARM Cortex‑M0+ performance, on‑chip memory and a comprehensive peripheral set tailored for embedded control and user‑interface applications. Its wide supply voltage range, low‑power modes and industrial temperature rating make it suitable for both battery‑powered and mains‑connected designs in consumer and appliance markets.

This device is especially well suited for designers seeking to minimize external components while retaining flexible connectivity, precise analog sampling and versatile display/LED drive options. The integrated debug and ISP features help accelerate development and simplify field updates.

Request a quote or submit an inquiry for pricing and lead‑time information to evaluate the A31G122RM for your next design.