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