A31L122RL

The A31L122RL is an ultra-low power microcontroller from ABOV Semiconductor based on the ARM Cortex-M0+ 32‑bit core. It integrates 32 Kbytes of flash and 8 Kbytes of SRAM and is designed for battery-operated and other ultra-low power applications requiring long battery life.

Operating from 1.65 V to 3.6 V and supporting an extended temperature range, the device combines a compact I/O count, mixed-signal peripherals and display support to address smart metering, home/building control, IoT and portable product designs.

Key Features

• Core & Performance — ARM Cortex‑M0+ 32‑bit core running up to 32 MHz for efficient control and real-time tasks.
• Memory — 32 Kbytes of internal flash memory and 8 Kbytes of SRAM, plus a 32‑byte backup register and a 128‑bit unique ID for device identification.
• Power and Low-Power Modes — 1.65–3.6 V supply range with low consumption figures from datasheet: 78 μA/MHz in Run mode; 12 μA in Run mode at low clock sources; 1.3 μA deep sleep with RTCC and retention; 0.6 μA deep sleep with power control; and an 8 μs wakeup time from power modes. Includes POR, LVR and LVI power management features and an internal RC oscillator.
• Analog Peripherals — 12‑bit ADC (1 Msps) with 16 input channels and two comparators for sensor and analog signal acquisition.
• Timers, RTC and Safety — Real Time Clock and Calendar (RTCC), a 24‑bit watchdog timer, and five general‑purpose 16‑bit timers supporting periodic, one‑shot, PWM and capture functions.
• Connectivity & Communication — Multiple serial interfaces including 1×USART (UART+SPI), 2×UART, 1×LPUART, 2×I2C (up to 1 Mbps), 2×SPI (up to 16 Mbps), smart card interfaces; SWD debug interface and ISP support for in-system programming.
• Display & System Features — Integrated LCD driver supporting up to 8×29 segments with 16‑step contrast control for direct user‑interface implementations.
• DMA, CRC & ID — Five DMA channels for peripheral offload and an 8/16/32‑bit CRC unit for data integrity, plus a 128‑bit unique device ID.
• I/O and Package — Up to 52 I/O pins in a 64‑LQFP package; operating temperature range −40 °C to +105 °C for commercial and industrial applications.

Typical Applications

• Smart Meters — Low power consumption, real‑time clock and multiple ADC channels support metrology, data logging and long battery life.
• Smart Card Readers — Integrated smart card interfaces and flexible serial ports simplify secure card and reader designs.
• Building & Home Control — LCD driver, low standby currents and multiple UART/I2C/SPI ports enable user interfaces and sensor/actuator control in door locks and automation nodes.
• IoT Devices & Wireless Sensors — Ultra‑low sleep currents, fast wakeup and compact memory/peripheral integration suit battery‑powered sensor nodes and edge devices.
• Portable Consumer & Healthcare — Mixed‑signal peripherals, RTC and low operating currents support portable instrumentation and wearable applications.

Unique Advantages

• Ultra‑low power profile: Documented microampere‑range deep sleep currents and 78 μA/MHz run consumption enable extended battery life in portable designs.
• Balanced integration: On‑chip flash, SRAM, ADC, comparators, LCD driver, DMA and CRC reduce external components and simplify PCB BOM.
• Flexible connectivity: A broad set of serial interfaces (USART/UART/LPUART/I2C/SPI/SC) supports multiple peripheral and host communications without additional bridges.
• Fast wakeup for duty‑cycled systems: 8 μs wakeup time from power modes allows rapid resume for responsive, low‑power applications.
• Display and UI ready: Integrated LCD driver with 16‑step contrast control enables direct connection to segmented displays for user interfaces.
• Industrial temperature range: −40 °C to +105 °C operation and a 64‑LQFP package provide deployment flexibility across commercial and industrial environments.

Why Choose A31L122RL?

The A31L122RL positions a high‑integration, low‑power Cortex‑M0+ MCU for designs that prioritize battery life, mixed‑signal capability and compact system implementation. Its combination of ADC channels, display support, multiple serial interfaces and power modes addresses a wide range of embedded applications from smart meters to portable consumer devices.

Backed by ABOV Semiconductor, the device offers a practical balance of performance, peripheral integration and power efficiency—helpful for development teams seeking a single MCU to handle sensing, control, communications and display functions in constrained, battery‑sensitive designs.

Request a quote or submit an inquiry to our sales team to discuss pricing, lead times and sample availability for the A31L122RL.