GENERAL DESCRIPTION

The SAA55xx standard 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, OSD, and some versions include an integrated data capture and display function.

The data capture hardware has the capability of decoding and displaying both 525 and 625-line World System Teletext (WST), Video Programming System (VPS) and Wide Screen Signalling (WSS) information. The same display hardware is used both for Teletext and OSD, which means that the display features available give greater flexibility to differentiate the TV set.

FEATURES

? Single-chip microcontroller with integrated On-Screen Display (OSD)

? Versions available with integrated data capture

? One Time Programmable (OTP) memory for both program Read Only Memory (ROM) and character sets

? Single power supply: 3.0 to 3.6 V

? 5 V tolerant digital inputs and I/O

? 29 I/O lines 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: Idle and Power-down

? Byte level I2C-bus with dual port I/O

? Pin compatibility throughout family

? Operating temperature: ?20 to +70 °C.