SAA5290

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.

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

The teletext decoder hardware is a derivative of the SAA5254 (IVT1.1X), and the TV control functionality provided by an on-chip industrial standard 80C51 microcontroller. A single-page static RAM is included on-board providing a complete one page teletext decoder and OSD memory.

The SAA5290 is available as a mask-programmed ROM version. An EEPROM version is also available for product development. Both versions are available in an SDIP52 package.