A31L214RL

The A31L214RL is an ultra-low power 32-bit microcontroller from Abov’s A31L21x series, built around an ARM Cortex-M0+ core and running up to 32 MHz. It integrates 128 Kbytes of Flash, 4 Kbytes of data flash and 20 Kbytes of SRAM alongside a broad set of peripherals for embedded and battery-powered systems.

Targeted at IoT nodes, smart meters, security and consumer devices, the A31L214RL combines extensive analog and digital interfaces, hardware security primitives and low-power modes to simplify system design and reduce BOM complexity.

Key Features

• Core — ARM Cortex-M0+ 32-bit core operating up to 32 MHz, with Nested Vector Interrupt Controller (NVIC) and SWD debug support for efficient real-time control and development.
• Memory — 128 Kbytes internal Flash, 4 Kbytes data Flash and 20 Kbytes SRAM plus a 32-byte backup register for code storage, data logging and fast runtime performance.
• Power and Supply — Wide operating supply 1.71 V to 3.6 V with integrated POR, LVR, LVI, internal RC oscillator and multiple sleep modes to support low-power applications.
• Low-power operation — Typical-run and deep-sleep currents documented: 90 μA/MHz in RUN; 0.99 μA in DEEP SLEEP with RTCC and retention; 0.35 μA in DEEP SLEEP with power control; 45 nA in SHUT DOWN (DEEP SLEEP mode 3). 5 μs wakeup time from power modes.
• Analog and Timing — 12-bit ADC with 16 channels (1 MSPS) plus temperature sensor, two comparators, multiple timers (nine general-purpose timers, PWM, capture), RTCC and watchdog timer for robust sensor and timekeeping tasks.
• Interfaces — Rich connectivity including 2×USART, 1×UART, 2×LPUART, 3×I2C (up to 1 Mbps), 4×SPI (up to 16 Mbps), smart card interface and an LCD driver supporting up to 27×8 segments.
• DMA and System Services — Seven DMA channels, CRC unit (8/16/32-bit), clock monitoring and boot logic to streamline data movement and system reliability.
• Security and RNG — AES-128 engine for encryption/decryption and a true random number generator to support secure communications and cryptographic operations.
• Package and I/O — 64-pin LQFP package with 57 I/O lines, and industrial temperature range from −40 °C to +105 °C for deployment in varied environments.

Typical Applications

• Smart Meters — Precise ADC, low-power standby and real-time clock enable accurate measurement, long battery life and scheduled reporting.
• Smart Card Readers — Smart card interface, hardware AES and RNG provide secure transaction handling and authentication.
• Building & Home Control — Multiple UART/I2C/SPI ports, LCD driver and low-power modes make it suitable for access control, HVAC and user-interface controllers.
• IoT and Wireless Sensor Nodes — Ultra-low power consumption, integrated ADC and multiple comms interfaces support sensor interfacing and edge processing in wireless sensor networks.
• Portable Healthcare & Consumer Electronics — Compact 64-LQFP package, fast wake-up and hardware crypto make it suitable for wearable or portable devices demanding security and responsiveness.

Unique Advantages

• Highly integrated peripherals: On-chip ADC, comparators, LCD driver, multiple serial interfaces, AES and RNG reduce external components and simplify PCB design.
• Optimized for low-power designs: Multiple sleep modes with sub-μA deep-sleep currents and a 5 μs wakeup time enable long battery life with responsive wake-up.
• Security-ready hardware: AES-128 and a true RNG provide built-in support for encryption and secure key generation without adding external security ASICs.
• Flexible connectivity: A mix of USART/UART/LPUART, I2C and SPI channels plus a smart card interface supports diverse system topologies and peripheral networks.
• Industrial temperature range and robust IO: −40 °C to +105 °C operation and 57 usable I/Os in a 64-LQFP package suit deployed embedded systems across environments.

Why Choose A31L214RL?

The A31L214RL pairs an ARM Cortex-M0+ core with a comprehensive peripheral set and proven low-power characteristics, positioning it for embedded designs that need code density, sensor interfacing and secure communications without a large BOM. Its integrated memory, DMA, hardware crypto and real-time clock streamline design and accelerate time-to-market for meter, access and IoT products.

As part of Abov’s A31L21x family, the A31L214RL is ideal for engineers seeking a balanced combination of performance, low-power operation and peripheral integration for industrial, consumer and connected device applications.

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