• TV encoder targets for handheld device and surveillance camera
• Supports multiple output formats such as analog TV (NTSC and PAL). Sync signals can be provided in separated or composite manner.
• Two on-chip 10-bit high speed DACs providing flexible output capabilities such as single or simultaneous CVBS and S-video outputs.
• 90/180/270 degree image rotation and vertical or horizontal flip.
• 16-Mbit SDRAM is used as a frame buffer for frame rate conversion.
• Flexible up and down scaling.
• Programmable 24-bit/18-bit/16-bit/15-bit/12-bit/8-bit digital input interface supports various RGB (RGB888, RGB666, RGB565 and etc), YCbCr (4:4:4 YCbCr, ITU656) and 2x or 3x multiplexed input. CPU interface is also supported.
• Supports flexible input resolution up to 800x800 and 1024x680.
• Pixel by pixel brightness, contrast, hue and saturation adjustment for each output is supported.
• Pixel by pixel horizontal position adjustment and line by line vertical position adjustment.
• TV/Monitor connection detection capability. DAC can be switched off based on detection result.
• Programmable power management.
• Flexible pixel clock frequency from graphics controller is supported. (2.3MHz –120MHz)
• Flexible input clock from crystal or oscillator is supported. (2.3MHz – 64MHz)
• Supports slave input clock mode only.
• Fully programmable through serial port.
• IO and SPC/SPD voltage supported is from 1.2V to 3.3V.
• Offered in a 64-pin LQFP package.

Description

The CH7028 is a semiconductor device targeting for surveillance system and consumer product for handheld market. This device accepts digital video signals through its 24-bit input bus and generates NTSC, PAL video signal by its 10-bit DACs. In addition, CH7028 has an embedded 16-Mbit SDRAM to support the CPU interface.

CH7028 has incorporated an advanced technology that can perform real-time video rotations and frame rate conversions for incoming video stream. These complicated tasks are achieved by storing video data into the internal SDRAM and applying scaling process if required. CH7028 provides great flexibility for accepting different video data formats including RGB and YCbCr (e.g. RGB565, RGB 666, RGB 888, ITU 656).

ORDERING INFORMATION
Part Number	Package Type	Shipping Format	RoHS Compliant	Operating Temperature Range
CH7028B-TF	Lead Free  64-pin LQFP	Tray	Yes	Commercial : -20 to 70°C
CH7028B-TF-TR	Lead Free  64-pin LQFP	Tape and Reel	Yes	Commercial : -20 to 70°C

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