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SAA5288

TV microcontroller with full screen On Screen Display (OSD)

Philips Electronics 

Philips Semiconductors

TV microcontroller with full screen

On Screen Display (OSD)

Preliminary specification

SAA5288

1 FEATURES

1.1 General

• On-chip TV control tuning

• Hardware and software compatible with SAA5290,

SAA5291 and SAA5296

• Single +5 V power supply

• RGB interface to standard decoder ICs, push-pull output

drive

• SDIP52 package

• Single crystal oscillator for display and microcontroller.

1.2 Microcontroller

• 80C51 microcontroller core

• 16 kbyte mask programmed ROM

• 256 bytes of microcontroller RAM

• Eight 6-bit Pulse Width Modulator (PWM) outputs for

control of TV analog signals

• One 14-bit PWM for Voltage Synthesis tuner control

• Four 8-bit Analog-to-Digital Converters (ADCs)

• 2 high current open-drain outputs for directly driving

LED’s etc.

• Switchable bit or byte-oriented I2C-bus interface.

1.3 Display

• Single page (1024 × 8) on-board On Screen Display

(OSD) memory

• Double size width and height capability for OSD

• Enhanced display features including meshing,

shadowing and additional display attributes

• 260 characters in mask programmed ROM

• Display clock derived internally to reduce peripheral

components to a minimum

• Automatic FRAME output control with manual override

• Standby mode for display hardware

• 525-line and 625-line display

• 12 × 10 character matrix

• Stable Display via slave synchronization to Horizontal

Sync and Vertical Sync.

2 GENERAL DESCRIPTION

The SAA5288 is a microcontroller for use in televisions

with an OSD generator compatible with the Economy

Teletext/TV microcontroller family (SAA5290, SAA5291,

SAA5296 etc.). TV control facilities are provided by an

on-chip industry standard 80C51 microcontroller and a

1 kbyte DRAM is included for OSD memory.

Hardware and software compatibility with the Economy

Teletext/TV microcontroller family minimizes the changes

required to develop a TV control function for areas where

teletext is not broadcast.

The device cannot acquire Teletext but is based on a

Teletext device. Therefore, throughout this document

references are made to Teletext especially when

describing the Display/OSD section. The Display/OSD

section is fully compatible with a Teletext display and has

all the features associated with Teletext (i.e. double

height/width, flash, teletext boxes, graphics, etc.).

The Display section is described with reference to Teletext

to allow software compatibility with the Economy

Teletext/TV microcontroller family.

3 QUICK REFERENCE DATA

SYMBOL

VDD

IDDM

IDDA

IDDT

fxtal

Tamb

PARAMETER

supply voltage (all supplies)

microcontroller supply current

analogue supply current

display supply current

crystal frequency

operating ambient temperature

MIN.

4.5

−

−

−

−

−20

TYP.

5.0

15

8

15

12

−

MAX.

5.5

30

15

30

−

+70

UNIT

V

mA

mA

mA

MHz

°C

1997 Jun 24

3

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