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Microchip, Hyundai interested in 10BASE-T1S

Key points

Microchip and Hyundai are testing 10BASE-T1S Ethernet technology for advanced vehicle networks.

This technology simplifies network design by eliminating the need for protocol gateways.

Its multi-drop feature allows multiple nodes to communicate on a single bus line.

Matthias Kaestner, corporate vice president, of Microchip Technology’s data center, networking and automotive business units.

Microchip Technology and Hyundai Motor Group recently announced a collaboration to test 10BASE-T1S Single Pair Ethernet (SPE) technology for advanced in-vehicle networks to provide improved ADAS and connected-vehicle features. HMG told SAE Media it is working with multiple technology partners to review the overall applicability of 10BASE-T1S technology and hopes 10BASE-T1S can help optimize the deployment of gateways and switches. The technology’s ethernet-based networking concepts might also contribute to simplifying network design and implementation for future zonal architectures.

We also spoke with Matthias Kaestner, corporate vice president of Microchip Technology’s data center, networking and automotive business units, about the partnership, via email.

When did Hyundai and Microchip start working together on this SPE project? Is it a one-off or part of a larger collaboration?

Microchip Technology and Hyundai Motor Group have a long-standing, strategic relationship, with direct collaboration between Microchip and HMG’s R&D teams. While our 10BASE-T1S SPE collaboration is the first we publicly disclosed, we have ongoing engagement. 10BASE-T1S SPE is just one of several key technologies in Microchip’s IVN portfolio, which also includes ASA Motion Link, an open-standard for ADAS camera connectivity, multi-Gigabit Ethernet PHYs and switches and PCIe switches.

Can you describe how the SPE solution will improve in-vehicle communication? What can 10BASE-T1S SPE do that other communication methods can’t?

10BASE-T1S enables an all-ethernet network architecture, connecting the cloud or central compute platform directly to edge nodes without the need for protocol gateways. Instead, switches can be used, simplifying the network. This approach optimizes system-level costs by reducing the need for multiple network types and associated hardware. A unique feature of 10BASE-T1S is its multi-drop capability, enabling several nodes to communicate on a single bus line, which is not possible with traditional point-to-point Ethernet or many legacy automotive networks.

What are some of the features of 10BASE-T1S SPE that are most applicable to automotive? The low power? The number of nodes? PLCA?

There are many features of 10BASE-T1S that are appealing for automotive. Those features include:

  • Multi-drop Ethernet: Multiple nodes can be attached to the same bus line, reducing cabling and complexity.

  • PLCA (Physical Layer Collision Avoidance): This organizes bus access to prevent collisions and minimize latency, ensuring reliable communication.

  • Power over Data Line: PoDL allows both power and data to be delivered over a single pair of wires.

  • Topology Discovery: This identifies both assembled and unassembled nodes on the bus, aiding in diagnostics and network management. Nodes can be configured at the OEM production line or during repairs, enhancing flexibility and serviceability.

  • Remote Control: It enables centralized management and control of edge devices over the network.

  • Established Ethernet Ecosystem: This ensures interoperability and scalability by leveraging mature ethernet protocols.

How might 10BASE-T1S help Hyundai and other OEMs develop zonal architectures in future vehicles?

As the industry moves toward zonal architecture, the number of sensors and actuators in vehicles is rapidly increasing. The multi-drop topology of 10BASE-T1S supports an all-ethernet, zonal network, reducing cable, integration complexity and cost. By extending ethernet to the network edge, 10BASE-T1S eliminates the need for gateways that translate between ethernet and legacy, low-speed proprietary buses, enabling a unified, all-ethernet in-vehicle network. Traditional edge node solutions require microcontrollers and custom software, increasing system complexity and cost. Microchip’s LAN866x family of 10BASE-T1S endpoints, featuring Remote Control Protocol, allows for software-less, direct bridging of packets to local digital interfaces. This approach reduces hardware and engineering costs, accelerates deployment and simplifies system architecture. It is ideal for applications such as lighting, audio and control functions, where endpoints can directly manage devices like LED drivers, microphones, speakers, sensors and actuators, all without additional software programming.

Topics:
ADAS Automotive Computer-Aided Design (CAD) Computer-Aided Engineering (CAE) Connectivity Electronics & Computers Electronics & Computers Semiconductors & ICs Software

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