A31G111LU

The A31G111LU is a 32-bit ARM Cortex-M0+ microcontroller optimized for cost-effective embedded control applications. It integrates a 32-bit Cortex-M0+ core running up to 40 MHz with 16 Kbytes of Flash and 4 Kbytes of SRAM to deliver compact, deterministic control and application code storage.

Designed for appliance and general-purpose embedded systems, the device supports a wide supply range (1.8 V to 5.5 V) and combines timers, motor-control PWM, ADC, serial interfaces, LCD/LED drive and system reliability features to simplify BOM and accelerate time-to-market.

Key Features

• Core & Performance — ARM Cortex-M0+ 32-bit core, up to 40 MHz, suitable for real-time control and embedded firmware.
• Memory — 16 Kbytes internal Flash and 4 Kbytes SRAM for application code and runtime data storage.
• Voltage & Temperature — Wide operating supply range of 1.8 V to 5.5 V and operating temperature from −40 °C to +105 °C (industrial grade).
• Timers & PWM — Multiple timers including 16-bit and 32-bit timers, six general-purpose timers and a 16-bit 3-phase PWM for motor and power control tasks.
• Analog — 12-bit ADC with 4 channels and 50 ksps conversion rate for sensor and signal acquisition.
• Connectivity — Serial interfaces including 1 USART, 1 UART and 2 I2C ports to support diverse peripheral connections.
• User Interface & LED/LCD Drive — LCD driver (up to 8 × 23 segments) and LED drive capability with up to 120 mA sink across PD0–PD5 for display and indicator control.
• System Reliability — POR (power-on reset), LVR/LVI (low-voltage reset/interrupt), watchdog timer (WDT) and clock monitoring for robust system behavior.
• Data Integrity — 16-bit CRC generator supporting CRC-16/CCITT for firmware and data integrity checks.
• Power Management — Internal RC oscillator plus support for external oscillators, with sleep and deep-sleep modes to reduce power consumption.
• Package & I/O — 24‑QFN package (4.0 × 4.0 × 0.5 mm) with 21 general-purpose I/O pins for compact board designs.
• Development & Debug — SWD debug interface and support for USART-based ISP for in-system programming and debugging.

Typical Applications

• Home Appliances — Control tasks, UI display drive and sensor interfacing in appliances such as air cleaners and small household units.
• Smart Door Locks — Low-power control, secure firmware update via ISP and reliable I/O for locking mechanisms and status indicators.
• Air Purification & Environmental Devices — Sensor acquisition with the 12-bit ADC, PWM-driven fans/motors and LCD/LED user interfaces.
• General Purpose Embedded Control — Compact motor control, timing, and communications for a broad range of cost-sensitive embedded products.

Unique Advantages

• Highly integrated peripherals: Timers, multi-channel PWM, ADC, LCD/LED drivers and serial interfaces reduce external components and simplify BOM.
• Flexible power and clocking: Wide supply range (1.8–5.5 V) and internal/external oscillator support enable flexible power architectures and clock sources.
• Compact footprint: 24‑QFN (4×4 mm) package with 21 I/Os is suited to space-constrained PCBs and consumer product form factors.
• Industrial temperature range: Rated from −40 °C to +105 °C for deployments across consumer and industrial environments.
• Built-in reliability features: POR, LVR/LVI, watchdog timer and clock monitoring simplify robust system design and fault handling.
• Display and indicator support: Dedicated LCD driver and high-current LED sink capability enable direct drive of common user interfaces without large external drivers.

Why Choose A31G111LU?

The A31G111LU positions itself as a compact, cost-effective MCU for embedded control where integrated peripherals and low-power operation matter. With a Cortex‑M0+ core, 16 KB Flash and 4 KB SRAM, the device balances performance and memory capacity for appliance, access-control and general-purpose designs.

Its combination of motor-capable PWMs, ADC channels, LCD/LED drive and robust system features (POR, LVR/LVI, WDT, CRC) reduces system complexity and BOM while the 24‑QFN package and industrial temperature rating support compact, field-deployable products.

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