GENERAL DESCRIPTION

The SAA5252 (LITOD) is a single-chip CMOS device, which will acquire, decode and display Line 21 Closed Captioning data from a 525-line composite video signal. Operation as an On-Screen Display (OSD) device is also possible. Normal and line progressive scan modes are supported.

FEATURES

• Complete ‘stand-alone’ Line 21 decoder in one package

• On-chip display RAM allowing full page Text mode

• Enhanced character display modes

• Full colour captions

• RGB interface for standard colour decoder ICs

• Automatic handling of Field 2 data

• Automatic selection of (1H, 1V), (2H, 1V) or (2H, 2V) scan modes

• Onboard OSD facility using Character generator

• RGB inputs to support existing OSD ICs

• I2C-bus or ‘stand-alone’ pin control

• Automatic data-ready signal generation on data acquisition

• Can decode signals recorded on standard VHS and S-VHS tape.