Automotive Test Solution Verifies MIPI A-PHY for Broadscale Interoperability


What you will learn:

  • What is the Mobile Industry Processor Interface?
  • The importance of conformance testing to ensure interoperability.

Engineers face many pressures when tasked with developing next-generation mobility solutions. The automotive industry is particularly affected, as a modern car must integrate not only with municipal and interstate transportation infrastructure, but also with consumers’ cloud environment. Ensuring system interoperability at all levels is a challenge that all vehicle designers will face in the future, and proper conformance testing is key to achieving this goal.

When it comes to portable wireless products, the Mobile Industry Processor Interface (MIPI) standard defines industry specifications for mobile devices. The MIPI standard is divided into three physical layer (PHY) types: MIPI D-PHY, M-PHY, and C-PHY. The MIPI D-PHY and C-PHY physical layers apply to basic device apps, while more advanced solutions are supported on the M-PHY layer.

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The MIPI Alliance specifications, promoted and governed by the MIPI Alliance, an industry group, address the interface requirements of application processors and peripherals. MIPI-compliant products serve network technologies such as GSM, CDMA2000, WCDMA, PHS, TD-SCDMA, among others.

conformance test

Keysight Technologies recently released an Automotive Serializer/Deserializer (SerDes) receiver compliance test solution to verify MIPI-compliant A-PHY devices (See figure). Based on the requirements of the Compliance Test Specification (CTS), the solution was developed with BitifEye Digital Test Solutions and Wilder Technologies together with Valens Semiconductor.

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As autonomous capabilities continue to be added to vehicles, it is important to ensure that the data collected and used by the systems is accurate, precise, reliable, and fast. The receiver compliance test solution recreates a compliant transmitter that can produce controlled issues such as a distorted signal, allowing analysis of its impact on the receiver’s ability to operate properly.

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The solution enables car manufacturers and their suppliers, engineers and system integrators to thoroughly test the receiver to validate its performance in the electronically noisy and harsh environment of a vehicle cabin.

Key features include a comprehensive test framework to identify the headroom within which a device under test (DUT) is operating, a device that couples noise to an active link to stress the receiver, and an arbitrary waveform generator. In addition, BitifEye Digital Test Solutions’ test software complements Keysight’s product portfolio to enable highly integrated and automated application-specific test systems.



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