Naxinwei: The NSSine™ Series of Real-Time Control MCUs/DSPs Empowers Digital Power and Motor Development
Recently, at the 2026 RT-Thread 20th Anniversary Celebration and Developer Conference, Song Kunpeng, Market Director at Naxinwei, delivered a technical presentation focused on high‑real‑time control. He provided an in‑depth analysis of how the NSSine™ series of real‑time control MCUs/DSPs offer a core solution that balances performance and cost‑effectiveness for digital power and motor control applications. In response to the evolving needs of the developer ecosystem, Naxinwei is partnering with RT-Thread to provide a more open and efficient domestically produced platform support for high‑real‑time control scenarios.
Focusing on Dedicated Scenarios: Beyond MCUs—A Specialized Platform for Real‑Time Control
The NSSine™ series of real-time control MCUs/DSPs (NS800RT7/5/3/1 series) are “dedicated chips” tailored specifically for real-time control applications, rather than general-purpose MCUs. Their target applications are squarely focused on fields that demand stringent real-time performance:
• Digital Power Photovoltaic energy storage, server power supplies, charging stations, on-board chargers (OBC), and more.
• Motor Control Industrial servos, variable frequency drives, automotive air conditioning compressors, and main drive motors, among others.
Its core advantage lies in its compatibility design of “no hardware changes, minor software adjustments” — it is pin-compatible with mainstream DSP products, while also leveraging Arm cores to develop custom peripherals from the ground up. This approach not only reduces customers’ migration costs but also delivers performance that surpasses existing solutions.
The NSSine™ series currently offers a full range of products, from entry-level to high‑end models. Some models have entered mass production and are available in both industrial‑grade and automotive‑grade versions, meeting the needs of diverse application scenarios.
A Comprehensive Analysis of the Entire Series: From High-End Computing Power to “M7 Equality”
The NSSine™ series features a product portfolio that covers the entire spectrum, with each product certified to AEC-Q100 Grade 1 and optimized for specific computing power requirements:
• High‑End Computing Power RT7 Series: Equipped with a dual‑core Cortex‑M7 processor (running at 400 MHz), paired with a self‑developed eMath acceleration unit and high‑specification peripherals, it delivers ultra‑high computing performance.
• Mid‑range flagship RT5/3 series: Built around a single Cortex-M7 core (with a main frequency of 200–300 MHz) and supporting synchronous control of multiple motors, it is a highly reliable choice for industrial control and automotive applications.
• Entry-Level Bestseller RT1 Series: Starting at just 5 yuan, the M7 delivers “M7-level equity,” featuring a main frequency of 200 MHz and a floating-point unit, along with an integrated programmable logic module, offering high‑performance multi‑channel control at an exceptional value.
Performance Validation: A Real‑Time Signal Chain Optimized Across the Entire Stack Is Key
The performance advantages of the NSSine™ series lie not only in the M7 core’s clock speed—ranging from 200 MHz to dual‑core 400 MHz across the entire lineup—but also in the deep optimization of the entire real‑time signal chain:
• eMath hardware accelerator: By hardware‑implementing algorithms such as trigonometric functions, square roots, and FFT, the computation speed can be increased by up to 3.5 times compared to software library implementations, significantly freeing up CPU resources.
• Ultra‑Fast Signal Chain: Measured end-to-end latency—from interrupt response and completion of algorithmic computation to PWM output update—the RT7 series requires only 1.5 microseconds, while the RT5 series takes about 2.5 microseconds, laying the foundation for high‑frequency, high‑precision control.
• High‑precision peripherals: It is equipped with an ADC featuring a sampling rate of 5 Msps, a fast comparator with a response time of 20 nanoseconds, and a high‑precision PWM (HRPWM) with a resolution as fine as 100 picoseconds.
Implementation of Typical Solutions: From Single-Chip Multi-Motor Systems to Complete Solutions
Leveraging the hardcore performance of the NSSine™ series, Naxinwei has developed multiple practical solutions:
• In the field of digital power, The 6.6kW single-phase bidirectional OBC solution based on the NS800RT5039 utilizes a SiC topology and can achieve full topology control with a single chip, boasting a peak efficiency exceeding 96% and suitable for both in-vehicle and charging station applications.
• In the field of motor control, The NS800RT5/3 series enables synchronous sensorless FOC control of up to four PMSM motors, with ample computational redundancy; the automotive air conditioning compressor solution powered by the NS800RT3025 utilizes fully domestically produced components and is compatible with 400V platforms, supporting OTA upgrades.
Lighting the “Eco‑Tree”: Lowering Development Barriers and Accelerating Solution Implementation
To help developers get up to speed quickly, NaXinWei has built a comprehensive suite of development tools and an ecosystem support system.
• Software Level It is natively compatible with the mainstream toolchains Keil MDK and IAR EWARM. Self‑developed, free NovoStudio open‑source development platform (Based on GCC and Eclipse) It integrates functions such as a digital oscilloscope, real‑time variable refresh, and graphical code generation, while also providing comprehensive support for underlying drivers, BootCode, and communication software.
• Hardware Level The NSSine™ Pad evaluation board comes equipped with an on-board emulator (USB Type-C interface) featuring isolation and surge protection. The onboard CAN transceiver supports both CAN 2.0 and CAN FD, while the connectors cover all IP resources of the chip. It is also compatible with J-Link emulators, allowing developers to start their projects right out of the box.
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