GENERAL DESCRIPTION

The SAA7187 encodes digital YUV video data to an NTSC, PAL CVBS or S-Video signal. The circuit accepts differently formatted YUV data with 640 or 768 active pixels per line. It includes a sync/clock

generator and on-chip Digital-to-Analog Converters (DACs).

FEATURES

• CMOS 5 V device

• Digital PAL/NTSC encoder

• System pixel frequency selectable for 12.27 MHz (60 Hz fields) or 14.75 MHz (50 Hz fields)

• 24-bit wide YUV input port or

• 16-bit wide YUV input port or

• Input data format Cb, Y, Cr, etc. (CCIR 656)

• I2C-bus control port

• MPU parallel control port

• Encoder can be master or slave

• Programmable horizontal and vertical input synchronization phase

• Programmable horizontal sync output phase

• OSD overlay with Look-Up Tables (LUTs) 8×3 bytes

• Line 21 Closed Caption encoder

• Cross-colour reduction

• DACs operating at twice oversampling with 10-bit resolution

• Controlled rise/fall times of output syncs and blanking

• Down-mode of DACs

• CVBS and S-Video output simultaneously

• PLCC68 package.