A31G123CL

The A31G123CL is a 32-bit microcontroller based on the ARM Cortex-M0+ core, delivering up to 64 Kbytes of on-chip Flash and 6 Kbytes of SRAM. Designed for embedded control in consumer and industrial applications, the device combines a wide voltage range, multiple timers and serial interfaces, and integrated display and analog peripherals for compact, cost-effective system designs.

With a maximum core clock of 40 MHz, support for internal and external oscillators, sleep/deep-sleep modes and power-management features such as POR, LVR and LVI, the A31G123CL targets applications requiring reliable control, sensor interfacing and user-display support across a broad operating temperature range.

Key Features

• Core  ARM Cortex-M0+ 32-bit core running up to 40 MHz for efficient control and real-time processing.
• Memory  64 Kbytes of on-chip Flash and 6 Kbytes of SRAM for program and data storage.
• Power and Supply  Operates from 1.8 V to 5.5 V and includes power-management features: POR, LVR and LVI plus an on-chip LDO.
• Timers and PWM  Ten general-purpose timers including multi-purpose 16-bit and 32-bit timers and a 16-bit timer with six-channel PWM for timing, capture and control functions.
• Analog  12-bit A/D converter sampling up to the device’s supported rate with an 11-channel input configuration on this 48-LQFP variant.
• Serial Interfaces  Multiple serial interfaces including USART and UART plus I2C for sensor and peripheral connectivity.
• Display and LED Driving  Integrated LCD driver (up to 8×39 segments with 16-step contrast control) and high-current sink capability (up to 120 mA across eight PD pins) for segment and LED driving.
• System Reliability  16-bit CRC generator (CRC-CCITT, CRC-16) and a 24-bit watchdog timer for data integrity and system supervision.
• Oscillators and Debug  Internal RC oscillator with external crystal support and SWD debug interface for development and in-system programming.
• Package and I/O  48-LQFP (7×7 mm, 0.5 mm pitch) surface-mount package with 45 user I/Os; industrial-grade operating range to +105 °C for demanding environments.

Typical Applications

• Smart Door Locks  Integrates secure control, display and sensor interfaces for access systems using on-chip timers, ADC and display drivers.
• Air Cleaners  Drives user interfaces, sensor acquisition and control loops with multiple serial interfaces and PWM/timer resources.
• General-Purpose Embedded Control  Provides a compact, feature-rich MCU platform for appliances and devices that require mixed-signal integration and display capability.

Unique Advantages

• Highly integrated peripheral set: ADC, multiple timers, PWM channels, CRC and LCD driver reduce external components and simplify BOM.
• Flexible power-range: 1.8–5.5 V operation and on-chip power-management features enable use across a variety of single-supply systems.
• Strong display and LED support: LCD controller with contrast control plus high-current sink capability on dedicated pins for direct segment and LED driving.
• Targeted I/O density in a compact package: 45 I/Os in a 48-LQFP (7×7 mm) package provide a balance of integration and board-space efficiency.
• Industrial-grade operation: Specified to operate from −40 °C to +105 °C for reliability in harsh environments.
• Complete development and integrity features: SWD debug, CRC generator and a 24-bit watchdog support robust firmware development and runtime protection.

Why Choose A31G123CL?

The A31G123CL combines a proven ARM Cortex-M0+ core with a comprehensive set of on-chip peripherals—analog, timing, serial and display—to deliver a compact, efficient platform for embedded control in consumer and industrial devices. Its wide supply voltage range, industrial temperature rating and integrated power-management features make it suitable for designs that require reliability and flexibility across varied operating conditions.

As part of the A31G12x family, the A31G123CL offers a consistent MCU architecture with multiple package and feature options to scale across product lines, enabling streamlined development and long-term product planning.

Request a quote or submit an inquiry to our sales team for pricing, availability and lead-time information on A31G123CL.