GENERAL DESCRIPTION
The SAA55xx OSD only family of devices 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 function.
The main differences between the OSD only family and the SAA55xx Text/CC family of baseline devices are:

• Program ROM size: 16 to 64-kbyte
• Display RAM size: 1.25-kbyte (1 page Text OSD or CC/OSD)
• Auxiliary RAM size: 0.75-kbyte
• No teletext data capture (Closed Caption only)
• Additional power saving mode (Standby).

FEATURES
• Single-chip microcontroller with integrated On-Screen Display (OSD)
• One Time Programmable (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 port 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 Light Emitting Diode (LED)
• Single crystal oscillator for microcontroller, OSD and data capture
• Power reduction modes: Standby, Idle and Power-down
• Byte level I2C-bus up to 200 kHz with dual port I/O (Slave mode up to 400 kHz)
• 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.