Philips Semiconductors
Product specification
10-page intelligent teletext decoders
FEATURES
SAA5261, SAA5262 and SAA5263
•
Complete 625-line teletext decoder in a single
integrated circuit thereby reducing printed-circuit board
area and cost
•
Automatic detection of transmitted pages so that only
existing pages will be selected by page-up and
page-down once inventory validated
•
Automatic detection of transmitted Fastext links or
service information (packet 8/30)
•
On-screen display for user interface (menus, etc.) using
teletext and dedicated menu icons
•
Video Programming System (VPS) decoding
•
Wide Screen Signalling (WSS) decoding
•
8-page Fastext decoder
•
6-page TOP decoder in addition to capture of Basic TOP
Table (BTT) and 3 Additional Information Table (AIT)
pages
•
4-page user defined list mode
•
Yugoslavian, Cyrillic, Greek/Turkish, Thai,
Arabic/Hebrew, Pan-European and
Arabic/English/French language coverage
•
High level command interface via I
2
C-bus giving easy
control from a low software overhead
•
High level command interface is backward compatible to
SAFARI interface
•
625 and 525 line display
•
RGB interface to standard colour decoder ICs, push-pull
output drive
•
Versatile 8-bit open-drain I/O expander
•
Single 12 MHz crystal oscillator for reduced cost
•
+5 V power supply.
SAA5261; SAA5262; SAA5263
SAA5262 and SAA5263
•
Automatic Channel Installation (ACI)
•
Enhanced SAFARI interface providing additional
commands.
SAA5263
•
Electronic Programme Guide (EPG) feature.
GENERAL DESCRIPTION
The SAA526xPS ICs are single-chip 10-page 625-line
World System Teletext (WST) decoders with a high level
command interface, SAFARI compatible.
It has been designed so that the overall system cost is kept
to a minimum. This has been achieved through the
capability of the device to be driven from a single +5 V
power supply, low cost 12 MHz crystal oscillator and the
high level command interface, which offers the benefit of
low software overhead in the TV microcontroller.
The SAA526xPS offers automatic detection of Fastext or
TOP transmissions. The device also incorporates a facility
to detect the pages in the transmission, which allows only
transmitted pages to be selected by page-up and
page-down.
SAA5262 and SAA5263 provide Automatic Channel
Installation (ACI) information.
SAA5263 provides access to Electronic Programme Guide
(EPG) information.
1998 Apr 22
2
Philips Semiconductors
Product specification
10-page intelligent teletext decoders
PINNING
SYMBOL
V0
V1
V2
V3
V4
V5
V6
V7
res
res
res
res
V
SSD1
SCLK1
SDAT1
SA
FP
HSMODE
VSMODE
PDI
PL
V
SSA
CVBS1
CVBS2
BLACK
I
ref
FRAME
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
SAA5261; SAA5262; SAA5263
DESCRIPTION
versatile open-drain input/output bit 0 (should be tied HIGH)
versatile open-drain input/output bit 1 (should be tied HIGH)
versatile open-drain input/output bit 2 (should be tied HIGH)
versatile open-drain input/output bit 3 (should be tied HIGH)
versatile open-drain input/output bit 4 (should be tied HIGH)
versatile open-drain input/output bit 5 (should be tied HIGH)
versatile open-drain input/output bit 6 (should be tied HIGH)
versatile open-drain input/output bit 7 (should be tied HIGH)
reserved
reserved
reserved
reserved
digital ground 1
serial clock input 1 (NVRAM)
serial data input/output 1 (NVRAM)
slave address input: LOW selects 58H; HIGH selects 60H
field polarity input: LOW selects first half line; HIGH selects second half line at the start of an
even field
horizontal sync mode control input: LOW selects HSYNC on rising edge
vertical sync mode control input. LOW selects VSYNC on rising edge
power-down imminent input: this input should be pulled LOW to indicate that the system is
about to lose power
phase-lock output: HIGH indicates that the system is phase-locked to the CVBS input
analog ground
CVBS input: this signal is applied via a 100 nF capacitor (nominal input 1 V (p-p)
this pin should be connected to ground if unused
black level input: a 100 nF capacitor should be connected to V
SSA
reference current input for analog circuits: for correct operation a 27 kΩ resistor should be
connected to V
SSA
Frame output for use in non-interlaced displays: during teletext off, teletext mixed with TV
picture and subtitles this pin is inactive. In full teletext mode this pin provides a 25 Hz square
wave. FRAME = 1 = odd, FRAME = 0 = even.
digital ground 2
contrast reduction: active LOW output which allows selective contrast reduction of the
television picture to enhance a mixed mode display
picture on output: HIGH indicates that a TV picture is present and that the SAA526xPS is in
TV mode, mix mode, subtitle mode or news flash mode
RGB reference input: drive level reference for RGB outputs
blue dot rate character output of the blue colour information: the high voltage level is defined
by the RGBREF pin (can source 4 mA)
V
SSD2
COR
PON
RGBREF
B
28
29
30
31
32
1998 Apr 22
5
嵌入式系统
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