Video Encoder 3DAC 10-Bit 64-Pin PQFP

The SAA7105H is an advanced next-generation video encoder which converts PC graphics data at maximum 1280 × 1024 resolution (optionally 1920 × 1080 interlaced) to PAL (50 Hz) or NTSC (60 Hz) video signals. A programmable scaler and anti-flicker filter (maximum 5 lines) ensures properly sized and flicker-free TV display as CVBS or S-video output. Alternatively, the three Digital-to-Analog Converters (DACs) can output RGB signals together with a TTL composite sync to feed SCART connectors. When the scaler/interlacer is bypassed, a second VGA monitor can be connected to the RGB outputs and separate H and V-syncs as well, thereby serving as an auxiliary monitor at maximum 1280 × 1024 resolution/60 Hz (PIXCLK < 85 MHz). Alternatively this port can provide Y, PB and PR signals for HDTV monitors. The device includes a sync/clock generator and on-chip DACs. All inputs intended to interface to the host graphics controller are designed for low-voltage signals between down to 1.1 V and up to 3.6 V.

• Digital PAL/NTSC encoder with integrated high quality scaler and anti-flicker filter for TV output from a PC
• Supports Intel Digital Video Out (DVO) low voltage interfacing to graphics controller
• 27 MHz crystal-stable subcarrier generation
• Maximum graphics pixel clock 85 MHz at double edged clocking, synthesized on-chip or from external source
• Programmable assignment of clock edge to bytes (in double edged mode)
• Synthesizable pixel clock (PIXCLK) with minimized output jitter, can be used as reference clock for the VGC, as well)
• PIXCLK output and bi-phase PIXCLK input (VGC clock loop-through possible)
• Hot-plug detection through dedicated interrupt pin
• Supported VGA resolutions for PAL or NTSC legacy video output up to 1280 × 1024 graphics data at 60 or 50 Hz frame rate
• Supported VGA resolutions for HDTV output up to 1920 × 1080 interlaced graphics data at 60 or 50 Hz frame rate
• Three Digital-to-Analog Converters (DACs) for CVBS (BLUE, CB), VBS (GREEN, CVBS) and C (RED, CR) at 27 MHz sample rate (signals in parenthesis are optionally), all at 10-bit resolution
• Non-interlaced CB-Y-CR or RGB input at maximum 4 : 4 : 4 sampling
• Downscaling and upscaling from 50 to 400%
• Optional interlaced CB-Y-CR input of Digital Versatile Disk (DVD) signals
• Optional non-interlaced RGB output to drive second VGA monitor (bypass mode, maximum 85 MHz)
• 3 × 256 bytes RGB Look-Up Table (LUT)
• Support for hardware cursor
• HDTV up to 1920 × 1080 interlaced and 1280 × 720 progressive, including 3-level sync pulses
• Programmable border colour of underscan area
• Programmable 5 line anti-flicker filter
• 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
• Adjustable output levels for the DACs
• 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
• Optional cross-colour reduction for PAL and NTSC CVBS outputs
• Power-save modes
• Joint Test Action Group (JTAG) boundary scan test