A31G346RN

The A31G346RN is a 32-bit microcontroller built around an Arm® Cortex®-M0+ core delivering up to 48 MHz operation. It combines substantive on-chip memory and a broad peripheral set to support general-purpose embedded designs across industrial, consumer, and instrumentation segments.

Designed for flexible power and clock domains, the device supports 1.8 V to 5.5 V operation, multiple low-power modes (RUN, SLEEP, DEEP-SLEEP), and integrated system features such as POR, LVR/LVI and clock monitoring to simplify robust system design.

Key Features

• Core  Arm® Cortex®-M0+ 32-bit core running up to 48 MHz for efficient control and deterministic interrupt handling (NVIC with 29 interrupt sources).
• Memory  256 Kbytes of code Flash with read-protection options and 32 Kbytes of on-chip SRAM to support firmware, buffers and RTOS use cases.
• Power & Clock  Wide operating voltage range (1.8 V–5.5 V), POR, Low-Voltage Reset (LVR) and Low-Voltage Indicator (LVI), plus internal RC and external oscillator support and clock monitoring.
• Timers  Multiple timer resources including six 16-bit timer channels and two 32-bit timers with PWM, capture, one-shot and timer/counter modes for motor control and timing tasks.
• Analog  12-bit ADC with up to 1 Msps conversion rate and up to 10 analog inputs for sensor measurement and data acquisition.
• Communication Interfaces  Rich serial connectivity with 4 USART ports, 3 I2C ports and 2 SPI ports to support diverse peripheral networks and HMI interfaces.
• DMA & Peripheral Integration  Four-channel DMA supporting 8/16/32-bit transfers across 19 internal peripherals to offload CPU and accelerate data movement.
• System Reliability  CRC calculation unit (CRC-CCITT, CRC-16, user-defined/auto CRC), 24-bit watchdog timer with reset and periodic interrupt modes, real-time clock/calendar and temperature sensor support.
• I/O & Packaging  Up to 50 general-purpose I/O pins, available in a 64-LQFP (14 × 14 mm, 0.8 mm pitch) surface-mount package; commercial operating temperature range −40 °C to 85 °C.

Typical Applications

• Industrial control  Real-time timers, multi-channel PWM and robust I/O make the A31G346RN suitable for machine control and process automation tasks.
• Sensor hubs & data acquisition  A 12-bit, 1 Msps ADC with multiple analog inputs and DMA support enables efficient sensor sampling and pre-processing.
• Connectivity gateways  Multiple USART, I2C and SPI ports allow protocol bridging and interface aggregation for instrumentation and IoT edge nodes.
• Consumer device control  Flash and SRAM capacity, combined with low-voltage operation and power modes, supports embedded user interface and appliance control functions.

Unique Advantages

• Balanced performance and efficiency: A Cortex-M0+ core at up to 48 MHz provides responsive control while remaining energy-efficient for battery-aware designs.
• Comprehensive on-chip resources: 256 KB Flash and 32 KB SRAM reduce external memory needs and simplify board-level design.
• Flexible power and clock management: Wide VCC range (1.8 V–5.5 V), POR/LVR/LVI and multiple clock sources support diverse power architectures and voltage domains.
• Peripheral-rich integration: Timers, ADC, RTC, CRC and multiple serial interfaces consolidate common system functions and lower BOM complexity.
• Deterministic I/O and DMA support: Four DMA channels plus 50 mappable I/O pins enable high-throughput, low-latency data handling without heavy CPU overhead.
• Package and temperature suitability: 64-LQFP (14×14 mm) package and −40 °C to 85 °C operating range accommodate a wide set of assembly and environmental requirements.

Why Choose A31G346RN?

The A31G346RN positions itself as a versatile, well-integrated microcontroller for designs that require a capable 32-bit control core, ample on-chip memory, and a broad peripheral set. Its combination of ADC performance, multiple timers, extensive serial interfaces and DMA support addresses embedded designs that need both real-time control and moderate data throughput.

Engineers specifying the A31G346RN benefit from simplified board design and system integration thanks to on-chip CRC, watchdog, RTC and power management features, along with a wide supply voltage range and commercial temperature rating for flexible deployment scenarios.

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