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GENERAL DESCRIPTION

The SAA56xx 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 incorporate an integrated Data Capture and display function for either Teletext or Closed Caption.

FEATURES

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

? Versions available with integrated Data Capture

? Both active HIGH and active LOW reset pins

? OTP memory for both Program ROM and character sets

? In-System Programming (ISP) option for the embedded OTP memories using IEEE1149 (JTAG: Joint Test Action Group) interface

? Single power supply: 3.0 to 3.6 V

? 5 V tolerant digital inputs and I/O

? 32 I/O ports via individual addressable controls

? Larger Character ROM, up to 1020 characters of 12 × 10 pixels

? Smoothing capability on sized characters

? Programmable I/O for push-pull, open-drain and quasi-bidirectional and high-impedance

? 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, Standby and Power-down

? Byte level I2C-bus up to 400 kHz dual port I/O

? 64 Dynamically Redefinable Characters for OSDs

? Increased 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