SAA5265 Просмотр технического описания (PDF) - Philips Electronics

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SAA5265

10 and 1 page intelligent teletext decoders

Philips Electronics 

Philips Semiconductors

10 and 1 page intelligent teletext decoders

Preliminary specification

SAA5264; SAA5265

FEATURES

The following features apply to both SAA5264 and

SAA5265:

• Complete 625 line teletext decoder in one chip reduces

printed circuit board area and cost

• Automatic detection of transmitted fastext links or

service information (packet 8/30)

• On-Screen Display (OSD) for user interface menus

using teletext and dedicated menu icons

• Video Programming System (VPS) decoding

• Wide Screen Signalling (WSS) decoding

• Pan-European, Cyrillic, Greek/Turkish and

French/Arabic character sets in each chip

• High-level command interface via I2C-bus gives easy

control with a low software overhead

• High-level command interface is backward compatible

to Stand-Alone Fastext And Remote Interface (SAFARI)

• 625 and 525 line display

• RGB interface to standard colour decoder ICs, current

source

• Versatile 8-bit open-drain Input/Output (I/O) expander,

5 V tolerant

• Single 12 MHz crystal oscillator

• 3.3 V supply voltage.

SAA5264 features

• Automatic detection of transmitted pages to be selected

by page up and page down

• 8 Page fastext decoder

• Table Of Pages (TOP) decoder with Basic Top Table

(BTT) and Additional Information Tables (AITs)

• 4 Page user-defined list mode.

GENERAL DESCRIPTION

The SAA5264 is a single-chip ten page 625-line World

System Teletext decoder with a high-level command

interface, and is SAFARI compatible.

The SAA5265 is a single-chip one page version of the

SAA5264.

Both devices are designed to minimize the overall system

cost, due to the high-level command interface offering the

benefit of a low software overhead in the TV

microcontroller.

The SAA5264 has the following functionality:

• 10 page teletext decoder with OSD, Fastext, TOP,

default and list acquisition modes

• Automatic channel installation support

• Closed caption acquisition and display

• Violence Chip (VChip) support.

The SAA5265 has the following functionality:

• 1 Page teletext decoder with OSD, fastext and default

acquisition modes

• Automatic channel installation support

• Closed caption acquisition and display

• VChip support

• No EEPROM fitted (there is no list mode feature).

2000 Jan 27

2

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