D-Boss LT-40FLP, Руководство по обслуживанию

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SERVICE MANUAL
PAGE:
22
CIRCUIT DESCRIPTIONS
1.SCALER SECTION.
Device: MX88L285
Features: Advanced Image Scaling/ processing
Automatic Image Optimization
Frame buffer interface
Microprocessor interface
On-screen display
Color processing
8-bit display outputs
Main/Sub – input ports
1) Description
The highly flexible MX88L285 is the mixed-signal product from the display processors.
MX88L285 is a highly integrated display processor with advanced digital signal processing.
MX88L285 provides high design scalability by accepting input images from multiple
Sources and displaying them on any flat panel display.
For the conversion of VGA input signals to higher-resolution outputs, the MX88L285
uses a Smart-scaling TM -3 filter scaling algorithm that accepts programmable parameters
for horizontal and vertical scaling. The MX88L285 scaling engine allows text and graphics
images to be handled appropriately with different scaling algorithms.
Image centering is supported for applications where image manipulation is not needed.
The MX88L285 flexible SDRAM/SGRAM interface is designed to support VGA to
WXGA resolution panels to provide a cost-effective solution.
Fabricated in an advanced CMOS process, the MX88L285 is provided in a space-saving
–388-lead PBGA surface-mount plastic package.
2) Block Diagram.