saa5700 NXP Semiconductors, saa5700 Datasheet - Page 2

• Manufacturer Part Number: saa5700
• Description: Chinese Character System Teletext Ccst Decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
1997 May 16
SAA5700GP
TYPE NUMBER
Acquisition and display of the 625-line PAL CCST
Chinese standard for teletext, with Chinese and Latin
character sets
Supports multiple DRAM sizes: 256K
1M
additional decoder/demultiplexer IC
Acquires and stores in background up to (typically)
400 pages with 1M
CCST Fastext, with capability of displaying Chinese
characters on Fastext prompt row
Meshing for reduced contrast video background in
subtitles and boxes
Full line and screen colour to all edges of screen
Supports 625-line 50/100 Hz display modes
Scan-locked and stand-alone sync modes; supports
video-locked sync modes with external PLL
Easy control via high level I
Sync mode switching and picture centring via I
SAFARI commands
Supports external decryption unit for encrypted data.
Chinese Character System Teletext
(CCST) decoder
4 bits, 4M
4 bits and 2
QFP64
NAME
4 bits external DRAM
2
C-bus SAFARI commands
plastic quad flat package; 64 leads (lead length 1.95 mm);
body 14
1M
4 bits with an
4 bits,
20
2.8 mm
2
C-bus
DESCRIPTION
2
GENERAL DESCRIPTION
The SAA5700 is a Chinese teletext decoder suitable for TV
and multimedia applications. It incorporates all the data
slicing, acquisition and display circuitry on-chip, as well as
the logic for memory management. An external DRAM is
used to store the currently displayed page and also the
precaptured teletext pages.
An external ROM is used to store the ideographic Chinese
character set. There is a high level software interface with
easy commands for the control of the decoder. Control is
achieved via the I
The device is available in a QFP64 package.
PACKAGE
2
C-bus.
Preliminary specification
SAA5700
SOT319-2
VERSION