GENERAL DESCRIPTION
The SAA55xx family of microcontrollers are a derivative of the Philips industry-standard 80C51 microcontroller and are intended for use as the central control mechanism in a television receiver. They provide control functions for the television system, On-Screen Display (OSD) and some versions include an integrated data capture and display function.

FEATURES
• Single-chip microcontroller with integrated OSD
• Versions available with integrated data capture
• OTP memory for both program ROM and character sets
• Single power supply: 3.0 to 3.6 V
• 5 V tolerant digital inputs and I/O
• 29 I/O ports via individual addressable controls
• Programmable I/O for push-pull, open-drain and
   quasi-bidirectional
• Two port lines with 8 mA sink (at <0.4 V) capability, for
   direct drive of LED
• Single crystal oscillator for microcontroller, OSD and
   data capture
• Power reduction modes: Idle, Power-down and Standby
• Byte level I2C-bus interface with dual port I/O
• 32 Dynamically Redefinable Characters for OSDs
• Special graphic characters allowing four colours per
   character
• Selectable character height 9, 10, 13 and 16 TV lines
• Pin compatibility throughout family
• Operating temperature: −20 to +70 °C.