P83C845 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P83C845

3.5-12 MHz, microcontroller for TV and video

Philips Electronics 

Philips Semiconductors

Microcontrollers for TV and video (MTV)

Product specification

83C145; 83C845

83C055; 87C055

1 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%.

2 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.

3 APPLICATIONS

Providing tuner functions and an OSD facility, it represents

a next generation replacement for the currently available

parts.

4 ORDERING INFORMATION

TYPE NUMBER

NAME

PACKAGE

DESCRIPTION

VERSION

P83C055BBP

P87C055BBP

P83C145BBP

P83C845BBP

SDIP42 plastic shrink dual in-line package; 42 leads (600 mil) SOT270-1

TEMP.

RANGE

(°C)

0 to +70

FREQ.

(MHz)

3.5 to 12

1996 Mar 22

3

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