Hangshun Chips: HK32F403 CAN-FD Breaks the Impasse in Industrial Connectivity

In fields such as industrial automation, new-energy vehicles, and intelligent control, the traditional CAN bus is facing bottlenecks due to its low data transmission rate and limited frame capacity, making it difficult to meet the demands of real-time interaction with massive amounts of data. Hangshun Chips is now proudly introducing the HK32F403 CAN-FD, a core product that boasts high speed, wide bandwidth, strong compatibility, and exceptional reliability. With these robust technical capabilities, it provides a domestically developed, optimal solution for efficient communication in complex scenarios, helping equipment break through performance limitations and seize the initiative in the era of smart connectivity.

I. Core Highlights of CAN-FD: Performance Leap, Disrupting Traditional Communication

The Hangshun HK32F403 CAN-FD is fully compatible with the CAN 2.0A/B protocol and, at the same time, breaks through the traditional performance ceiling of CAN, achieving a qualitative leap in communication capabilities.

Dual-rate flexible switching doubles transmission efficiency.

Supports a dual-mode operation: low-speed arbitration phase (up to 1 Mbps) combined with a high-speed data phase (up to 8 Mbps), with rate switching at the push of a BRS bit. During the arbitration phase, the traditional CAN baud rate ensures bus stability; in the data phase, the transmission rate is instantly boosted, increasing the effective data payload by up to eightfold and significantly enhancing overall transmission efficiency. (Note: The actual achievable data rate is subject to physical-layer factors such as the bus transceiver and cable length.)

64-byte large frame capacity—say goodbye to data fragmentation.

The data segment supports up to 64 bytes, eight times the 8-byte limit of traditional CAN, enabling the one-shot transmission of complete sensor data and control commands. This significantly reduces message fragmentation and reassembly, lowers system overhead, and shortens data interaction latency, making it particularly well-suited for complex networks with multiple nodes and large data volumes.

Enhanced error detection for more stable and secure communication

By employing the enhanced CAN-FD CRC (CRC_17/CRC_21), the likelihood of undetected errors is significantly lower compared with traditional CAN. Additionally, the newly introduced ESI bit provides real-time feedback on node error states, enabling fault transparency and rapid fault localization, thereby ensuring zero-error communication in high-reliability applications such as industrial and automotive environments.

Native compatibility, seamless upgrade with no hassle.

Fully compatible with the traditional CAN physical layer and supports hybrid CAN/CAN-FD networking (provided all nodes in the network have CAN-FD frame recognition capability). During an upgrade, only the end-node MCU needs to be replaced, while the existing transceivers and wiring harness can be retained, enabling rapid system bandwidth enhancement and reducing retrofit costs.

II. Core Hardware Advantages of the Chip: All-Purpose Configuration, Adaptable to Diverse Scenarios

The HK32F403 is built on the ARM Cortex-M4 core (with DSP instruction support), operating at a maximum clock frequency of 108 MHz. It features up to 128 KB of Flash memory and 24 KB of SRAM, along with a rich array of peripherals and a highly reliable design, providing robust computational performance for CAN-FD communication.

Powerful computing capabilities with zero-latency real-time response.

The Cortex-M4 core combined with DSP instructions enables efficient processing of high-speed CAN-FD data, meeting the real-time computing requirements of industrial control, motor drive, and other applications. This ensures synchronous data transmission and reception with instruction execution, resulting in more agile system response.

Rich peripheral support and maximum integration

It integrates multiple peripherals, including UART, SPI, I2C, ADC, and timers, and supports DMA data transfer. The chip can simultaneously interface with sensors, actuators, displays, and other devices, achieving integrated “communication + control + acquisition” on a single chip. This reduces the need for external components, shrinks the PCB footprint, and lowers system costs.

Industrial-grade quality, reliable operation in harsh environments

Operating temperature range: -40°C to +105°C; strong anti-interference capability; suitable for harsh environments such as industrial sites, automotive applications, and outdoor settings. Supports multiple low-power modes, balancing performance and power consumption to meet the long-endurance requirements of battery-powered devices.

Domestic substitution and secure, controllable supply chains

Leveraging Hangshun Chip’s mature, domestically sourced supply chain, our products deliver performance on par with mainstream international offerings, while offering greater supply stability and superior cost-effectiveness. This helps customers reduce their reliance on overseas chips and ensures the smooth execution of projects.

III. Industry Applications: Empowering Multiple Sectors and Unlocking New Intelligent Possibilities

Leveraging the high-speed communication capabilities of CAN-FD and the chip’s comprehensive feature set, the HK32F403 is widely suited for industrial automation, new energy, automotive electronics, smart control, and other fields, serving as the communication core in complex application scenarios.

1. Industrial Automation: Efficient Interconnection of Production Lines, Intelligent Manufacturing Upgrade

In industrial robotics, PLCs, servo motor control, and smart sensor networks, the HK32F403’s CAN-FD interface enables high-speed transmission of multi-axis control commands and real-time operational data, supports synchronous multi-axis control, ensures high-precision, highly synchronized line operation, and enhances production efficiency and stability.

2. New Energy Sector: Precise BMS Management for Safe and Reliable Energy Storage

Suitable for applications such as battery management systems (BMS), energy storage inverters, photovoltaic inverters, and charging guns, CAN-FD can transmit hundreds of cell voltage and temperature parameters in a single communication session, enabling real-time monitoring of battery state-of-health and balanced cell management to ensure the safe and efficient operation of new-energy equipment.

3. Automotive Electronics: Upgrading In-Vehicle Communication, Empowering Intelligent Driving

When deployed in in-vehicle T-BOXs, electric two-wheeler controllers, and ADAS assistance systems, CAN-FD enables efficient transmission of sensor fusion results, control commands, and diagnostic data, meeting the communication bandwidth and real-time requirements of intelligent driver-assistance systems. At the same time, it remains compatible with traditional CAN-based vehicle body networks, facilitating seamless upgrades to in-vehicle systems.

4. Intelligent Control and Medical Electronics: Precise Interaction, Stability, and Reliability

In applications such as intelligent lighting control systems, medical monitoring equipment, and industrial power supplies, the HK32F403’s CAN-FD interface enables real-time exchange of control commands and monitoring data, with highly reliable communication that ensures stable device operation—making it well-suited for safety-critical fields like healthcare and lighting.

IV. Empowering with Chips, Connecting Everything Intelligently

The Hangshun HK32F403 centers on a native CAN-FD interface, integrating a high-performance core, a rich array of peripherals, and industrial-grade quality. It not only overcomes the bottlenecks of traditional communication but also delivers superior compatibility, reliability, and cost-effectiveness, providing a domestically developed core enabler for the intelligent upgrade of industries such as manufacturing, new energy, and automotive.