Four-channel video decoder has MIPI-CSI2 for vehicle views

Designed to support SoCs and application processors used in automotive around view systems, two decoders from Intersil have been announced.

The ISL79985 replaces up to nine discrete components with a single chip, says Intersil. It delivers four-channel NTSC/PAL/SECAM analogue decoding performance for generating 360 degree around view video to detect objects around the vehicle and assist with reversing and parking.

The ISL79986 has a line-interleaved BT.656 interface. The decoders integrate four analogue video decoders with 10bit ADCs to support four analogue camera CVBS inputs simultaneously. The ISL79985’s MIPI-CSI2 interface lowers system EMI, is claimed to reduce the number of pins compared to a traditional parallel interface. Both decoders include the company’s proprietary automatic contrast adjustment (ACA) image enhancement that adapts to rapidly changing lighting conditions. ACA is able to automatically increase or reduce brightness and contrast to optimise the image for greater visibility and safety in low light and sunlight glare conditions.

Other features are integrated programmable automotive short diagnostics — short-to-battery and short-to-ground detection — on each differential input channel and an integrated PLL to generate high frequency outputs while using a low cost 27MHz crystal oscillator.

The decoders are qualified to AEC-Q100 Grade-2 for operation from -40 to +105 degree C.

The ISL79985 with MIPI-CSI2 output, and the ISL79986 with BT.656 output are available now in a 7.0 x 7.0mm, 48-lead QFN package.

The ISL79985-EVAL evaluation board has a user manual, schematics and firmware.


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