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.