Mipi Dsi Serializer Deserializer Driver Assistance Systems

Lets explore what Automotive SerDes interfaces are for and why they are important.

Lets explore what automotive SerDes interfaces are for and why they are important.

Mipi Dsi Serializer Deserializer Driver Assistance Systems

Advanced driver assistance systems (ADAS), in-vehicle infotainment (IVI) and autonomous driving systems (ADS) are increasing the need for more sophisticated cameras, sensors, displays and onboard processing power.

However, these trends require new innovations in safety and driver applications, making vehicles more technically complex.

Automotive OEMs and suppliers can support these advancements by taking advantage of existing technologies while simplifying development through standardization.

An industry-backed technical specification for this critical interface will increase innovation, reduce cost and improve functional safety, security and performance.

It provides an asymmetric data link in a point-to-point or daisy-chain topology, providing high-speed unidirectional data, embedded bidirectional control data and optional power delivery over a single cable.

The Alliance also introduced MIPI Automotive SerDes Solutions (MASS), a series of full-stack connectivity solutions built on A-PHY, which will enable end-to-end security and functional safety for applications involving ADAS, IVI and ADS.

As more components support A-PHY, cameras and displays will be able to use CSI-2 and DSI-2 natively over A-PHY (without bridge chips) to reduce cost, complexity, wiring, weight and use of space.

It does this by allowing higher-layer protocolsincluding the well-established MIPI CSI-2 and MIPI DSI-2 specifications, as well as other approved protocols such as VESAs DisplayPort and Embedded DisplayPort (DPeDP)to operate directly over physical links throughout a vehicle.

Key advantages include the reduction of cost, cable and development time.

The ECU performs image signal processing with graphics overlay and sends the video stream to one or more displays.

On this leg, the data can be transmitted using either MIPI DSI-2 or VESA DPeDP over A-PHY.

The result is the ability to transport higher resolutions than HD video from the backup camera to the drivers display.

A-PHYs protocol-agnostic data link layer allows multiple protocols to be multiplexed over one A-PHY link.

PALs are in development for MIPI CSI-2, MIPI DSI-2, VESAs DPeDP, I 2 C, GPIO, I2S and Ethernet.

These extensions, along with a MIPI A-PHY Reference Compliance Test Suite, are expected to be available in early 2021.

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