Comprehensive automotive Ethernet will enable secure autonomous vehicles – NXP
The portfolio builds on BroadR-Reach – an automotive standard defined by the OPEN Alliance industry group, with the aim to make consumer-level Ethernet capable of meeting the automotive industry’s stringent requirements. NXP is a founding member of OPEN Alliance and the first to offer a truly automotive portfolio consisting of two product families, Ethernet transceivers (TJA1100) and Ethernet switches (SJA1105). Product samples are immediately available, and NXP’s Ethernet transceivers will begin production in Q4, 2015.
Ethernet is expected to provide the network backbone for autonomous driving and connected vehicles, as it is capable of the high data bandwidth, communications speed, weight reduction, and cost efficiency that future connected cars require. NXP’s modular approach with switch and transceiver is intended to allow for flexible and cost efficient combinations, enabling car makers to build optimal solutions for a wide range of networking architectures — from entry-level cars to high-end luxury vehicles. This will also pave the way for new, distributed networking architectures (see NXP’s video) in the future. The adoption of Ethernet, NXP contends, is quickly accelerating with the rise of secure connected cars and the subsequent high demands for data transport.
By developing technology purpose-built for automotive applications, NXP’s Ethernet PHY TJA1100 supports automotive low power modes. When the engine is off, the systems sleep. Meanwhile, the Ethernet PHY stays partially powered, waking up the system only upon activity on the network. In contrast to conventional solutions, the NXP Ethernet PHY does not require additional components such as voltage regulators to stay on while the engine is off, benefiting power consumption and battery lifetime.
Transceivers – TJA1100
– Compliant to OPEN Alliance BroadR-Reach (OABR) standard (IEEE: 100BASE-T1)
– Designed following an automotive development flow
– Form factor: 6 x 6mm HVQFN package with minimal external component count
– Supports low-power modes to save battery life
– Automotive grade ESD and EMC
NXP has developed the Automotive Ethernet Switch SJA1105 in close cooperation with TTTech, a global leader in the field of robust networking and safety controls and specialists in deterministic behaviour of Ethernet. The switch uses Deterministic Ethernet technology to guarantee message latency in applications such as autonomous driving, where deterministic communication is vital for reasons of operational efficiency or functional safety. Deterministic Ethernet supports the trend toward increasing bandwidth requirements of up to 1 Gbit/sec, while ensuring high reliability in networked control systems and high availability in fail-operational applications. It incorporates several standards including Ethernet (IEEE 802.3), Time-Triggered Ethernet (SAE AS6802) as well as Audio Video Bridging (AVB) and Time-Sensitive Networking (TSN).
Digital Switch – SJA1105
– 5 Port automotive Ethernet Switch supporting network speed up to 1 Gbit/sec
– Layer 2 Store and Forward Switch
– MII / RMII / RGMII Interface
– Port Mirroring and VLAN support (IEEE 802.1Q and IEEE 802.1P)
– AVB and TSN support
– Enables Deterministic Ethernet solutions; Compliant to SAE AS6802 TTEthernet fault-tolerant clock synchronisation, and providing a Virtual Link
– Scalable, flexible and cost optimized configuration based on single and dual Port PHYs
NXP has a video, “Ethernet in New Distributed Architectures” and further information on its approach to Automotive Ethernet
NXP Semiconductors; www.nxp.com
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