DESCRIPTION

The SAA5290 is a single-chip one page teletext decoder and television control microcontroller. The device will decode 625-line based World System Teletext transmissions and provides television control functions and On-Screen Display (OSD) functions.

FEATURES

General

• Complete one page teletext decoder and TV microcontroller in a single 52-pin package

• Eastern European, Western European and Turkish language variants covered in one device

• Double size, double width and double height character capability for On-Screen Display (OSD)

• Enhanced display features including meshing and shadowing

• Separate display and acquisition timing for increased flexibility

• Minimum peripheral component count

• 525 line and 625 line display synchronization

• Standby mode through power-down of teletext and analog hardware.



Microcontroller

• 16 kbytes masked ROM (16 kbytes EEPROM variant for product development)

• 256 bytes of on-chip RAM

• Six 6-bit Pulse Width Modulators (PWM) and one 14-bit precision PWM

• 4-bit Digital-to-Analog Converter (DAC) and comparator with a 3-input multiplexer allowing implementation of 3 Analog-to-Digital Converters (ADC) in software

• 2 high current (10 mA) open-drain outputs

• Interrupt logic 0 triggered on rising and falling edges, providing pulse-width measurement for remote control decoding

• Master and slave bit-level I2C-bus hardware.