SAA5700 PDF даташит
Спецификация SAA5700 изготовлена «NXP Semiconductors» и имеет функцию, называемую «Chinese Character System Teletext CCST decoder». |
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Детали детали
Номер произв | SAA5700 |
Описание | Chinese Character System Teletext CCST decoder |
Производители | NXP Semiconductors |
логотип |
24 Pages
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INTEGRATED CIRCUITS
DATA SHEET
SAA5700
Chinese Character System Teletext
(CCST) decoder
Preliminary specification
File under Integrated Circuits, IC02
1997 May 16
No Preview Available ! |
Philips Semiconductors
Chinese Character System Teletext
(CCST) decoder
Preliminary specification
SAA5700
FEATURES
• Acquisition and display of the 625-line PAL CCST
Chinese standard for teletext, with Chinese and Latin
character sets
• Supports multiple DRAM sizes: 256K × 4 bits,
1M × 4 bits, 4M × 4 bits and 2 × 1M × 4 bits with an
additional decoder/demultiplexer IC
• Acquires and stores in background up to (typically)
400 pages with 1M × 4 bits external DRAM
• 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 I2C-bus SAFARI commands
• Sync mode switching and picture centring via I2C-bus
SAFARI commands
• Supports external decryption unit for encrypted data.
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 I2C-bus.
The device is available in a QFP64 package.
ORDERING INFORMATION
TYPE NUMBER
SAA5700GP
PACKAGE
NAME
DESCRIPTION
QFP64 plastic quad flat package; 64 leads (lead length 1.95 mm);
body 14 × 20 × 2.8 mm
VERSION
SOT319-2
1997 May 16
2
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Philips Semiconductors
Chinese Character System Teletext
(CCST) decoder
BLOCK DIAGRAM
Preliminary specification
SAA5700
handbook, full pagewidth
VDDD1 VSS1 VDDD2 VSS2 VSS3 VDDX VSSO VDDA VSSA VSS
BLACK
4
CVBS
5
35 33 48 49 2
19 20 9
8
SYNC
SEPARATOR
FRONT END
ACQUISITION
TIMING
14,16,
26
REF+
STN
IREF
10
6
7
DATA
ACQUISITION
12 MHz
PACKET
BUFFER
BUS
OSCILLATOR
AND CLOCK
GENERATOR
1
6 MHz 64
59
PROCESSOR
BLOCK
24 MHz
63
60
61
62
OSCOUT
OSCIN
RESET
DCL
DDA
SCL
SDA
ROMCS
RAS
CAS
WE
RA10 to RA0
RD7 to RD0
27
42
53
44
54, 41, 40,
38 to 36,
32 to 28
MEMORY
INTERFACE
55 to 58,
52, 51,
47, 46
SAA5700
DISPLAY
INTERFACE
21
R
22
G
23
B
24
BLAN
DISPLAY
TIMING
17
LFB
18
FFB/STTV
25
ODD/EVEN
DISPLAY SECTION
MGG539
1997 May 16
Fig.1 Block diagram.
3
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Номер в каталоге | Описание | Производители |
SAA5700 | Chinese Character System Teletext CCST decoder | NXP Semiconductors |
SAA5700GP | Chinese Character System Teletext CCST decoder | NXP Semiconductors |
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