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