Cover story
all these elements. Authentication, encryption and secure updates are an increasingly important aspect of today’s networking requirements. Microchip has been a leader in the
development of Single Pair Ethernet. It helped write the standards at the IEEE and has developed a comprehensive portfolio of SPE solutions that are flexible and scaleable. Whether running at 10Mbits/s, 100Mbits/s or 1000Mbits/s, Microchip has a PHY, MAC-PHY or Ethernet switch that can drive a single pair of wires to transmit the data. 10BASE-T1S technology is one of the newest types of Ethernet interconnection defined by the IEEE. The IEEE 802.3cg standard was
published in 2019. Microchip was one of the key participants that created the standard within the IEEE. This standard was developed to expand Ethernet to the edge of Operational Technology or OT networks. Existing systems had bandwidths of hundreds of kilobits per second, so going to megabits per second provides for future growth. The technology uses half-duplex
communication and provides for a flexible topology, from point-to-point to multidrop configurations. Multidrop means that multiple devices connect to a bus line made up of a single pair of wires. 10BASE-T1S is defined to use a single balanced pair of conductors. This can be a single twisted pair of wires, other configurations for wire pairs, or even parallel traces on a printed circuit board or server backplane. The new 10BASE-T1S standard defines a physical layer that creates new business opportunities for companies that embrace pervasive all-Ethernet systems. Data anywhere in the system can be used in innovative ways that enable new applications. Cost can be reduced since 10BASE- T1S uses simple components, software and wiring. A new 10BASE- T1S MAC-PHY Ethernet controller now in the marketplace allows the simplest of microcontrollers to become
part of the Ethernet world. 10BASE- T1S eliminates the need for gateways previously required to translate data from different hardware systems. The multidrop feature reduces the number of ports in switches as devices connect to a single bus line. Using well-established security mechanisms and the unified interfaces of the Ethernet world reduces risks when creating applications at the edge of industrial networks. Security
mechanisms are well understood by a large body of designers and implementers. Any issues can be quickly discovered given how many people work with the technology, and they can also be quickly resolved. Design, software development, testing and maintenance resources at all levels of OT and IT networks can concentrate on the same basic communication mechanisms.
www.microchip.com/ethernet
Microchip offers a complete range of SPE PHYs, from 10Mbits/s to 1000Mbits/s, all offering Industrial grade temperature support. Further enhanced support for industrial applications includes safety, security and extended cable reach. Complete SPE networked systems solutions can be realised with a broad portfolio of SPE switch devices. Microchip offers intelligent switches that support Time Sensitive Networking (TSN) and integrated SPE PHY technology. Our latest release is an industry-first true single-chip SPE switch with TSN support, integrating switch fabric, CPU, RAM and, uniquely, FLASH code memory. Designers can now implement ‘out of the box’ Single-Pair switching solutions, with little or no expertise in T1 PHY technology or AVB and TSN specifications.
Figure 1: The trend is to connect everything with Ethernet for a more powerful, more flexible network to meet industrial challenges
www.electronicsworld.co.uk March 2023 07
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