A31S134SN

The A31S134SN is a general-purpose 32-bit microcontroller built around an energy-efficient ARM Cortex-M0+ core running up to 32 MHz. It combines 128 KB of code flash, 4 KB of data flash and 16 KB of SRAM with a broad set of on-chip peripherals for embedded control and monitoring applications.

Designed for flexible supply and low-power operation, the device supports 1.8 V to 5.5 V operation and multiple power modes (RUN, SLEEP, DEEP-SLEEP), making it suitable for a wide range of commercial embedded systems that require integration, deterministic control and robust system management.

Key Features

• Core 32-bit ARM Cortex-M0+ core running up to 32 MHz for efficient control and deterministic interrupt handling.
• Memory 128 KB code flash plus 4 KB data flash and 16 KB SRAM with read-protection options to support secure code and data storage.
• Power and Voltage Wide operating voltage range from 1.8 V to 5.5 V, integrated LDO, and support for RUN, SLEEP and DEEP-SLEEP modes to optimize power consumption.
• Timers and Timing Multiple timers including six 16-bit timers and two 32-bit timers with PWM, capture and one-shot modes, plus a 24-bit watchdog timer and watch timer/RTC functionality.
• Analog 12-bit A/D converter with 14 input channels and up to 50 ksps conversion rate for multi-channel sensor acquisition.
• Connectivity Serial interfaces including UART/USART, SPI and I2C for peripheral and sensor communication; Serial Wire Debug (SWD) for development and debugging.
• DMA and CRC Two-channel DMA supporting 8/16/32-bit transfers across internal peripherals plus a CRC unit (CRC-16/CCITT) for data integrity and protocol support.
• System Reliability POR (power-on reset), LVR (low-voltage reset), LVI (low-voltage indicator), clock monitoring and nested vectored interrupt controller (NVIC) with 28 interrupt sources.
• GPIO and I/O Up to 41 I/O pins available on the 44-LQFP (10×10 mm, 0.8 mm pitch) package with sink-type high-current output capability and mappable external interrupts.
• Environmental Range & Package Commercial-grade operating temperature –40 to 85 °C and available in a compact 44-LQFP package (10×10 mm, 0.8 mm pitch).

Typical Applications

• Embedded control and monitoring Use the Cortex-M0+ core, timers and watchdog to implement deterministic control loops and reliable system supervision.
• Sensor interfacing and data acquisition Leverage the 12-bit ADC with 14 channels and DMA support for multi-channel analog measurement and efficient data movement.
• Human-machine interfaces and consumer devices Combine UART/USART, SPI, I2C and plentiful GPIO to drive displays, keys and user controls in consumer electronics and appliances.
• Industrial and commercial instrumentation Wide supply range, reset and voltage monitoring features plus robust timing peripherals suit instrumentation and monitoring equipment.

Unique Advantages

• Highly integrated memory and peripherals: 128 KB flash, 4 KB data flash and 16 KB SRAM with ADC, timers, DMA and CRC minimize external components and simplify BOM.
• Flexible power envelope: 1.8 V to 5.5 V operation and multiple low-power modes enable designs across battery-powered and line-powered systems.
• Comprehensive timing and safety features: Multiple 16-bit and 32-bit timers, watchdog and voltage monitoring improve system reliability and timing precision.
• Efficient data handling: Two-channel DMA and CRC hardware accelerate peripheral-to-memory transfers and validate data integrity with minimal CPU overhead.
• Compact, application-ready package: 44-LQFP package with 41 accessible I/Os provides a balance of size and connectivity for space-constrained designs.

Why Choose A31S134SN?

The A31S134SN positions itself as a compact, integrated microcontroller for general-purpose embedded designs that require a balance of processing, analog input and peripheral connectivity. Its ARM Cortex‑M0+ core, combined with sizeable on-chip flash and SRAM, supports responsive control tasks while hardware peripherals and DMA reduce CPU load.

With a wide supply range, dedicated reset/voltage monitoring and a commercial operating temperature range, the A31S134SN is well suited to developers seeking a scalable MCU platform for sensor-heavy, human-interface and industrial/commercial embedded applications where integration and predictable operation matter.

Request a quote or submit a pricing and availability inquiry to start evaluating A31S134SN for your next design.