Implementing MOSTCO's Roadmap: Page 2 of 8

August 25, 2016 //By Johann Stelzer, Microchip
Implementing MOSTCO's Roadmap
Despite the media hype about Ethernet in the car, the MOST technology is still far more established in the infotainment domain than any other networking technology. The current roadmap, introduced at this year’s MOST Forum has been enhanced; additional waypoints and goals have been added to the roadmap. This article addresses the most significant aspects of these goals, the status and the outlook from Microchip’s perspective.
a multivendor landscape are available once MOST specifications’ move to ISO is completed. Microchip assists the MOST Cooperation in paving the way to make MOST an ISO standard.

 

Maintain and sustain the existing technology MOST25/50/150

Microchip supports MOST25 as it continues rolling out in new car models. Major efforts expanding the INIC product portfolio have gone into 50Mbps and 150Mbps speed grades. While on the one hand continuous improvement in manufacturing is ongoing to deliver the committed year-over-year productivity for existing INICs, new products are under development which offer significant system cost reduction potential on the other hand, in the future. The ability of customers to optimize system costs will come multifaceted. For example, pin-compatible interface products will be manufactured in more efficient semiconductor technology. In addition, new INICs will be more specifically tailored for the application use case. The successful introduction of USB in the OS81118/OS81119 MOST150 INICs encourages the proliferation of this interface technology to other INIC products. USB interfaces are available on a broad range of infotainment, communication and driver-assist SOCs, allowing the customers to choose the most appropriate one for the intended use case. Other industry standard interfaces like PCI and xMII are under consideration for future products.


Fig.1: Application Specific MOST Network Interface IC Solutions

 

Drive cost reduction measures

Automotive technology analysts and automotive network reports often show MOST as an expensive networking solution. The reference points for these statements are MOST25 optical and MOST150 optical. What are the contributing factors? A closer look reveals that the lion’s share of the costs is associated with wiring harness, the FOT and the connector costs; external components required to meet emissions and robustness specifications, SOC and software add additional factors.

In an optical MOST150 solution, about two-thirds of the networking costs are related to connector, POF, FOT and cable. An optical MOST solution seems expensive. However, it delivers an unrivaled emissions and robustness performance, as

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