CH7035

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Features

  • DVI encoder support up to 1080p

  • SPDIF audio interface supports either 16-bit or 20-bit stereo data for up to 192kHz/2ch

  • Support 2 channel I2S digital audio input for up to 24-bit data stream (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz)

  • DDC master for reading EDID

  • Hot plug detection for DVI

  • On-chip frame buffer supports frame rate conversion provides the graphic controller the flexibility of video timing output

  • Advanced scaling engine to upsize/downsize input resolution for DVI display up to 1080p

  • Supports 8/12/16/18/24-bit parallel interface input for either RGB format (RGB-565, RGB-666 or RGB-888 and etc.) or YCrCb format (ITU-R 656 or ITU-R 601). 80/86 MPU interface and DE only mode are also supported.

  • Wide range of input resolutions support for up to 1366x768 (i.e. 640x480, 720x480, 720x576, 800x600, 1024x600, 1024x768, 1280x800, and etc.)

  • Image display rotation support at 90/180/270 degree or flipped in horizontal/vertical position

  • Pixel clock input frequency support for up to 165 MHz

  • IO Supply Voltages from 1.2V to 3.3V and SPC/SPD Supply Voltages from 1.8V to 3.3V.

  • Programmable power management

  • Device fully programmable through serial port or can automatically load firmware from Chrontel Boot ROM (CH9904)

  • Offered in a 88-pin QFN package

Describe

The Chrontel CH7035B is specifically designed for consumer electronics device and PC markets which multiple high definition content display formats are required. With its advanced video encoder, flexible scaling engine and easy-to-configure audio interface, the CH7035B satisfies manufactures’ product display requirements and reduces their cost of development and time-to-market.

The CH7035B’s 24-bit parallel bus accepts a wide range of input data formats from the graphic controller. The built-in video port supports 8/12/16/18/24-bit data interface as well as 80/86 MPU interface. The video format conversion module is capable of translating digital RGB-565, RGB-666, RGB-888 or YCrCb (ITU-R 656, ITU-R 601) signal to the DVI signal, combining with the audio stream. The device’s video capture block supports input display resolution for up to 1366x768 which can be either interlaced or non-interlaced timing.

The CH7035B has incorporated a high speed SDRAM to help manufactures design their product to achieve simultaneous LCD and DVI display. A sophisticated frame rate conversion technology in the device’s scaler retrieves LCD data from the SDRAM frame buffer, and increases the native display resolution up to 1080p DVI display. Furthermore, the CH7035B provides additional image manipulation features including image rotation which can be implemented through programming internal registers.

The device supports both SPDIF and 2-channel I²S digital audio input. Its high fidelity audio decoder engine has the capability of sampling audio frequency for up to 192k/2ch. The SPIDF supports PCM encoded data and compressed audio including Dolby Digital and DTS.

The CH7035B has an image enhancement function that can fine tune brightness, contrast, hue and saturation down to the pixel-level.

When the HPD signal is asserted, the CH7035B will automatically generate an interrupt to the processor. A build-in DDC port can read the EDID data from DVI monitor through programming. registers by the processor.

Structure diagram

Application Desc

 Refer to the AN-B037 for industrial products in detail

Technical Report

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Specifications

Input Interface  TTL/Digital RGB, TTL/YCbCr, TTL/BT1120

Output Interface  HDMI, DVIAudio InterfaceIIS, SPDIF Input

Other features  Scaler, Frame Buffer

Package Type  QFN88

OrderInfo

Part NumberPackage Type Number of Pins Operating Temperature Range

CH7035B-BF Lead Free - QFN88Commercial : -20 to 70°C

CH7035B-BFI  Lead Free - QFN88Industrial : -40 to 85°C

Video

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About Chrontel Overview Chrontel, headquartered in San Jose, California, is a privately-held company with over 130 employees worldwide. Incorporated in 1986, the company develops and markets mixed-signal integrated circuits for the PC, display and consumer mark...

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