GENERAL DESCRIPTION

The SAA5288 is a microcontroller for use in televisions with an OSD generator compatible with the Economy Teletext/TV microcontroller family (SAA5290, SAA5291, SAA5296 etc.). TV control facilities are provided by an on-chip industry standard 80C51 microcontroller and a 1 kbyte DRAM is included for OSD memory.

Hardware and software compatibility with the Economy Teletext/TV microcontroller family minimizes the changes required to develop a TV control function for areas where eletext is not broadcast.

FEATURES

General

• On-chip TV control tuning

• Hardware and software compatible with SAA5290, SAA5291 and SAA5296

• Single +5 V power supply

• RGB interface to standard decoder ICs, push-pull output drive

• SDIP52 package

• Single crystal oscillator for display and microcontroller.

Microcontroller

• 80C51 microcontroller core

• 16 kbyte mask programmed ROM

• 256 bytes of microcontroller RAM

• Eight 6-bit Pulse Width Modulator (PWM) outputs for control of TV analog signals

• One 14-bit PWM for Voltage Synthesis tuner control

• Four 8-bit Analog-to-Digital Converters (ADCs)

• 2 high current open-drain outputs for directly driving LED’s etc.

• Switchable bit or byte-oriented I2C-bus interface.

Display

• Single page (1024 × 8) on-board On Screen Display (OSD) memory

• Double size width and height capability for OSD

• Enhanced display features including meshing, shadowing and additional display attributes

• 260 characters in mask programmed ROM

• Display clock derived internally to reduce peripheral components to a minimum

• Automatic FRAME output control with manual override

• Standby mode for display hardware

• 525-line and 625-line display

• 12 × 10 character matrix

• Stable Display via slave synchronization to Horizontal Sync and Vertical Sync.