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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.