Full HD LCD video processor for automotive rear-view cameras

Full HD LCD video processor for automotive rear-view cameras

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Intersil’s highly integrated TW8844 instantly displays rearview camera live video, exceeding industry standards on start-up timing by 4x to prevent backover accidents.
By Graham Prophet

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TW8844 is an LCD video processor that interfaces with the latest generation of automotive SoCs. The highly integrated TW8844 is the first high-definition (HD) 1080p LCD video processor with analogue video decoder, two scalers and MIPI-CSI2 SoC interface. The TW8844 provides the reliability automakers require to ensure their rearview camera systems are compliant with the US Federal Motor Vehicle Safety Standard (FMVSS-111) for preventing injury or death caused by backover accidents. The TW8844 enables the migration from analogue to digital camera systems, and supports a variety of video interfaces and LCD panel resolutions up to full HD 1920 x 1080. The TW8844 LCD video processor is suitable for centre stack/head units, full display rearview mirrors, instrument cluster displays, and dual headrest rear-seat entertainment systems.

 

The FMVSS-111 law requires that all new vehicles sold in the U.S., beginning in May 2018, have rearview backup cameras and the rear camera video must display in less than two seconds after the driver places the vehicle into reverse gear.

 

The TW8844 video processor with MIPI-CSI2 output and TW8845 video processor with BT.656 output exceed the requirements of the FMVSS-111 law, displaying live video with graphics overlay in less than 0.5 seconds after vehicle ignition. The TW884x provides a robust rear-camera architecture to overcome the fast boot reliability issues inherent with today’s more complex center stack systems. Today’s head units are prone to operating system (OS) software freezes and hang-ups: the TW884x eliminates this problem by monitoring the SoC and camera output to determine if they are in a frozen or corrupted state. If the TW884x detects any issue, it bypasses the SoC and instantly displays the rearview camera video.

 

The TW8844 video processor with MIPI-CSI2 output comes in a 14 x 20 mm, 156-lead LQFP package, for $10.00 (1000).

 

Intersil; www.intersil.com/products/tw8844

 

A video clip is here; www.youtube.com/watch?v=P5_6yTsefhQ&feature=youtu.be

 

 

 

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