A31L122KU

The A31L122KU is an ultra-low power microcontroller in Abov’s A31L12x series based on an ARM Cortex-M0+ 32‑bit core. It integrates 32 Kbytes of Flash and 8 Kbytes of SRAM, runs up to 32 MHz and supports a wide set of peripherals for battery-operated and embedded applications.

Targeted at portable and low-power designs, the device combines low-voltage operation (1.65–3.6 V), multiple power modes and integrated analog and communication peripherals to simplify system design in IoT, smart meters, consumer and access-control applications.

Key Features

• Core  ARM Cortex-M0+ 32‑bit core running up to 32 MHz for efficient control and responsive interrupt handling.
• Memory  32 Kbytes of internal Flash and 8 Kbytes of SRAM with 32‑byte backup register for code storage and runtime data.
• Power and Low‑Power Modes  Operates from 1.65 V to 3.6 V. Typical consumption figures include 78 µA/MHz in run mode, 12 µA run-mode figures at low clock sources, deep‑sleep with RTCC and retention at 1.3 µA, and deep‑sleep with power control at 0.6 µA. Wake-up time from power modes is 8 µs.
• Analog  12‑bit A/D converter supporting 10 channels for precise sensor interfacing; ADC performance includes up to 1 MSPS conversion capability as described in the device family datasheet.
• Timers, DMA and System Peripherals  Five general-purpose 16‑bit timers, a low‑power timer, watchdog timer, CRC unit and five DMA channels to offload repetitive data moves and support deterministic timing.
• Interfaces & Connectivity  Rich serial connectivity including USART/UART, SPI, I2C and smart card interface for flexible peripheral integration.
• Display Support  Integrated LCD driver (13×3) for simple segmented-display implementations.
• Reliability and System Control  Includes POR, LVR, LVI protections, RTC/calendar, comparators, clock monitoring and SWD debug support for robust system-level control.
• Package & Temperature  Available in a compact 32‑QFN (32‑QFN‑0505) package with 28 I/O pins and rated for operation from −40 °C to +105 °C.

Typical Applications

• Smart Meters & Utility Devices  Accurate ADC, RTC/calendar and low‑power modes make the A31L122KU suitable for metering and periodic data-logging tasks.
• Smart Card Readers & Secure Access  Built‑in smart card interface and multiple serial ports enable secure transaction and reader designs.
• Home & Building Control  Low standby current, integrated timers and LCD driver support battery‑powered controls, locks and display interfaces.
• IoT & Wireless Sensor Nodes  Low-voltage operation, ultra‑low deep‑sleep currents and fast wake-up time are ideal for sensor sampling and low-duty-cycle communications.
• Portable Consumer & Healthcare Devices  Compact package, mixed-signal peripherals and efficient power modes support compact, battery-operated instruments.

Unique Advantages

• Highly integrated peripheral set: 32 KB Flash, 8 KB SRAM, ADC, LCD driver, RTC and multiple serial interfaces reduce external components and BOM.
• Designed for low-voltage battery systems: 1.65–3.6 V supply range supports common single‑cell and multi‑cell battery architectures.
• Ultra‑low power operation: Multiple sleep modes with sub‑microamp deep‑sleep currents and fast 8 µs wake-up help maximize battery lifetime.
• Flexible I/O and timing: 28 I/O pins, five 16‑bit timers and five DMA channels enable responsive control and efficient data movement without CPU load.
• Compact package for space‑constrained designs: 32‑QFN package provides a small footprint while exposing the necessary I/O for embedded interfaces.
• Industrial temperature range: Rated from −40 °C to +105 °C for use in a wide set of environments.

Why Choose A31L122KU?

The A31L122KU positions itself as a compact, ultra‑low power MCU that balances performance and integration for battery‑sensitive and embedded applications. With an ARM Cortex‑M0+ core, a comprehensive peripheral set and proven low‑power characteristics, it is suited for designers needing a cost‑effective, power‑aware controller with on‑board analog and display capabilities.

Its combination of Flash/SRAM capacity, mixed‑signal peripherals and industrial temperature rating makes the A31L122KU a practical choice for IoT endpoints, consumer handhelds, access control and portable instrumentation where board space, power budget and integration matter.

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