GENERAL DESCRIPTION

The SAA7102; SAA7103 is used to encode PC graphics data at maximum 800 × 600 resolution to PAL (50 Hz) or NTSC (60 Hz) video signals. A programmable scaler and interlacer ensures properly sized and flicker-free TV display as CVBS or S-video output.

FEATURES

• Digital PAL/NTSC encoder with integrated high quality scaler and anti-flicker filter for TV output from a PC

• 27 MHz crystal-stable subcarrier generation

• Maximum graphics pixel clock 45 MHz at double edged clocking, synthesized on-chip or from external source

• Up to 800 × 600 graphics data at 60 Hz or 50 Hz with programmable underscan range

• Three Digital-to-Analog Converters (DACs) at 27 MHz sample rate for CVBS (BLUE, CB), VBS (GREEN, CVBS) and C (RED, CR) (signals in parenthesis are optional); all at 10-bit resolution

• Non-interlaced CB-Y-CR or RGB input at maximum 4 : 4 : 4 sampling

• Downscaling from 1 : 1 to 1 : 2 and up to 20 upscaling

• Optional interlaced CB-Y-CR input Digital Versatile Disk (DVD)

• Optional non-interlaced RGB output to drive second VGA monitor (bypass mode, maximum 45 MHz)

• 3 × 256 bytes RGB Look-Up Table (LUT)

• Support for hardware cursor

• Programmable border colour of underscan area

• On-chip 27 MHz crystal oscillator (3rd-harmonic or fundamental 27 MHz crystal)

• Fast I2C-bus control port (400 kHz)

• Encoder can be master or slave

• Programmable horizontal and vertical input synchronization phase

• Programmable horizontal sync output phase

• Internal Colour Bar Generator (CBG)

• Optional support of various Vertical Blanking Interval (VBI) data insertion

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