SAA5700

INTEGRATED CIRCUITS DATA SHEET SAA5700 Chinese Character System Teletext (CCST) decoder Preliminary specification File under Integrated Circuits, IC02 1997 May 16 Philips Semiconductors Preliminary specification Chinese Character System Teletext (CCST) decoder FEATURES Acquisition and display of the 625-line PAL CCST Chinese standard for teletext, with Chinese and Latin character sets Supports multiple DRAM sizes: 256K × 4 bits, 1M × 4 bits, 4M × 4 bits and 2 × 1M × 4 bits with an additional decoder/demultiplexer IC Acquires and stores in background up to (typically) 400 pages with 1M × 4 bits external DRAM CCST Fastext, with capability of displaying Chinese characters on Fastext prompt row Meshing for reduced contrast video background in subtitles and boxes Full line and screen colour to all edges of screen Supports 625-line 50/100 Hz display modes Scan-locked and stand-alone sync modes; supports video-locked sync modes with external PLL Easy control via high level I2C-bus SAFARI commands Sync mode switching and picture centring via I2C-bus SAFARI commands Supports external decryption unit for encrypted data. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME SAA5700GP QFP64 DESCRIPTION plastic quad flat package; 64 leads (lead length 1.95 mm); body 14 × 20 × 2.8 mm SAA5700 GENERAL DESCRIPTION The SAA5700 is a Chinese teletext decoder suitable for TV and multimedia applications. It incorporates all the data slicing, acquisition and display circuitry on-c...