DESCRIPTION

The 83C055, Microcontroller for Television and Video (MTV) applications, is a derivative of Philips’ industry standard 80C51 microcontroller.

The 83C055 is intended for use as the central control mechanism in a television receiver or tuner.

FEATURES

• Masked ROM sizes:

– 8 kbytes (83C845)

– 12 kbytes (83C145)

– 16 kbytes (83C055)

– 16 kbytes OTP (87C055)

• RAM: 256 bytes

• On Screen Display (OSD) controller

• Three digital video outputs

• Multiplexer/mixer and background intensity controls

• Flexible formatting with OSD New Line option

• 128 × 10 bits display RAM

• Designed for reduced Radio Frequency Interference

(RFI)

• Character generator ROM:

– character format 18 lines × 14 dots

– 60 visible characters

– 4 special characters

• Eight text shadowing modes

• Text colour selectable per character

• Background colour selectable per word

• Background colour versus video selectable per character

• Eight 6-bit Pulse Width Modulators (PWM) for analog voltage integration

• One 14-bit PWM for high-precision voltage integration

• Digital-to-analog converter and comparator with 3 inputs multiplexer

• Nine dedicated I/Os plus 28 port bits (15 port bits with alternative uses)

• 4 high current open-drain port outputs

• 12 high voltage (+12 V) open-drain outputs

• Programmable video input and output polarities

• 80C51 instruction set

• No external memory capability

• Plastic shrink dual in-line package (0.07 inch centre pins)

• High-speed CMOS technology

• Power supply: 5 V ±10.

APPLICATIONS

Providing tuner functions and an OSD facility, it represents a next generation replacement for the currently available parts.