VIDEO AMP MERGED OSD PROCESSOR

The S1D2502A01 is a very high frequency video amplifier & wide range OSD processor 1 chip system with I2C Bus control used in monitors. It contains 3 matched R/G/B video amplifiers with OSD processor and provides flexible interfacing to I2C Bus controlled adjustment systems.

FEATURES

VIDEO AMP PART

? 3-channel R/G/B video amplifier, 175MHz @f-3dB

? I2C bus control items

— Contrast control: -38dB

— Sub contrast control for each channel: -12dB

— Brightness control

— OSD contrast control: -38dB

— Cut-off brightness control (AC coupling)

— Cut-off control for each channel (AC coupling)

— Switch registers for SBLK and video half tone and CLP/BLK polarity selection and INT/EXT CLP selection and generated CLP width control

? Built in ABL (automatic beam limitation)

? Built in video input clamp, BRT clamp

? Built in video half tone (3mode) function on OSD pictures

? Capable of 8.0Vp-p output swing

? Improvement of rise & fall time (2.2ns)

? Cut-off brightness control

? Built in blank gate with spot killer

? Clamp pulse generator

? OSD intensity

? BLK, CLP polarity selection

? Clamp gate with anti OSD sagging

OSD PART

? Built in 1K-byte SRAM

? 448 ROM fonts (each font consists of 12 × 18 dots.)

? Full screen memory architecture

? Wide range PLL available (15kHz — 96kHz, Reference 800 X 600)

? Programmable vertical height of character

? Programmable vertical and horizontal positioning

? Character color selection up to 16 different colors

? Programmable background color (up to 16 colors)

? Character blinking, bordering and shadowing

? Color blinking

? Character scrolling

? Fade-in and fade-out

? Box drawing

? Character sizing up to four times

? 76.8MHz pixel frequency from on-chip PLL (Reference 800 X 600)

FUNCTIONS

? R/G/B video amplifier

? OSD processor

? I2C bus control

? Cut-off brightness control

? R/G/B sub contrast/cut-off control

? Half tone