Intersil Introduces Full HD LCD Video Processor for Automotive Applications

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The highly integrated TW8844 instantly displays live video from the rear view camera, making the ability to prevent reverse accidents more than 4 times the industry standard

Intersil, a subsidiary of semiconductor solutions provider Renesas Electronics Corporation (TSE: 6723), today announced the launch of the industry's first full HD LCD video processor specifically designed for automotive applications connected to the latest generation of automotive SoCs. TW8844. The highly integrated TW8844 is built on top of Intersil's industry-leading automotive infotainment and display systems and is the first high-definition (HD) 1080p LCD video with analog video decoder, two scalar and MIPI-CSI2 SoC interfaces. processor.

The TW8844 provides the high reliability that automakers need to ensure that the rearview camera system meets US Federal Motor Vehicle Safety Standards (FMVSS-111) and prevents accidents caused by reversing accidents. The TW8844 helps transition from analog to digital camera systems and supports many video interfaces and resolutions up to 1920 x 1080 Full HD LCD panels. The TW8844 LCD video processor is ideal for automotive center console/audio bodies, full-screen rearview mirrors, combination meter displays, and dual-headrest rear seat entertainment systems.

Global automakers are beginning to equip new models with rearview camera systems. In accordance with the requirements of the US Children's Traffic Safety Act, the US National Highway Traffic Safety Administration issued regulations in March 2014 requiring automakers to install "tail-of-sight technology" for cars weighing less than 10,000 pounds. Technology). The new FMVSS-111 regulations stipulate that the driver must be able to see the rear area of ​​the vehicle when reversing, minimizing the blind area. The law aims to reduce casualties caused by reversing accidents, many of which involve children. According to the FMVSS-111 method, all new cars sold in the United States must be equipped with a rear view reversing camera from May 2018, and the rear view camera video must be displayed within 2 seconds after the driver reverses the gear.

The TW8844 video processor with MIPI-CSI2 output and the TW8845 video processor with BT.656 output exceed the FMVSS-111 method and can display live video with graphics overlay in less than 0.5 seconds after ignition. . The TW884x provides a robust rear view camera architecture to address the fast start-up reliability issues inherent in today's more complex center console systems. The current car audio body is prone to freeze and hang of the operating system (OS) software, causing the display image to freeze, or hindering the rear view camera from displaying live video. Software freezes and hangs become more common as operating systems running on SoCs become more complex. The TW884x eliminates this problem by monitoring the SoC and camera output to determine if it is in a frozen or error state. If the TW884x detects any problems, it bypasses the SoC and instantly displays the rearview camera video.

Philip Chesley, senior vice president of precision products at Intersil, said: "The TW884x's freeze detection feature uses a hard-wired connection that triggers an interrupt signal when a threshold violation occurs to ensure that the rear view camera of the car meets FMVSS-111 regulations and displays live video instantly. In addition, the TW884x's rear-view camera bypass architecture separates the camera-to-display signal path from the infotainment system, making it easier for automakers to achieve the ISO 26262 functional safety rating standard for camera systems."

Key features and specifications of the TW8844 and TW8845 video processors

Support for multiple video inputs from analog or digital HD cameras:

O10-bit ADC NTSC/PAL analog video decoder supports differential, pseudo differential and single-ended composite video inputs (two differential or four single-ended) with built-in battery short-circuit and short-to-ground diagnostics;

o Two independent digital RGB input ports, each with a maximum of 24 bits RGB @160MHz (1080p);

o Two LVDS OpenLDI input ports (shared with the second DRGB input), support single or dual input mode, 100MHz (maximum) per channel in single channel mode, 160MHz in dual channel mode;

o Supports a full HD input (1080p) or two HD inputs (720p);

Provides system flexibility to drive most LCD panels:

o LCD path for TTL/TCON, up to 24-bit DRGB, 160MHz (max);

oLVDS OpenLDI: dual channel; 100MHz (maximum) per channel in single channel mode, 160MHz in dual channel mode;

oTW8844 supports 4 channel (lane) MIPI-CSI2 output, maximum resolution 1080p, maximum rate 1Gb/channel

oTW8845 supports BT.656 output to SoC, maximum resolution 720p

Two input measurement engines with freeze/abnormal image detection diagnostics for monitoring inputs from SoCs and cameras.

EEPROM fast start allows register programming without the need for an external microcontroller

Two independent H/V scalars that support 1080p (1920 x 1080) maximum output resolution, allowing simultaneous processing of two different input sources while simultaneously outputting different data to the SoC and display, or simultaneously driving two different content Display.

Automatic contrast adjustment (ACA), white balance, and gamma correction optimize video quality.

Smooth input switching makes the screen flicker free when switching between various input sources

AEC-Q100, Level 2 certification, -40°C to +105°C operating temperature range

The TW8844 and TW8845 can be combined with Renesas Electronics' R-Car SoC series, as well as the ISL78302 dual LDO, ISL78322 dual 2A/1.7A synchronous buck regulator and the ISL78228 dual 800mA synchronous buck regulator for the TW884x Power rails are provided by SoC and other key components on the car infotainment board.