STV5345 Datasheet, PDF (1/25 Pages) STMicroelectronics – TELETEXT DECODER WITH 8 INTEGRATED PAGES

STV5345
STV5345/H - STV5345/T
TELETEXT DECODER WITH 8 INTEGRATED PAGES
. _{COMPLETE TELETEXT DECODER INCLUD-}
. ^{ING ON-CHIP 8 PAGES MEMORY, REDUC-}
ING EMC RADIATIONS
UPWARD SOFTWARE AND HARDWARE
. COMPATIBLE WITH PREVIOUS SGS-THOM-
SON’s DECODER SDA5243
DIRECT INTERFACE TO AN EXTERNAL
STATIC RAM OF 8kBYTES FOR UP TO 16
PAGES APPLICATION
. AUTOMATIC SELECTION OF UP TO SIX NA-
TIONAL LANGUAGES
. _{FOUR SIMULTANEOUS PAGE REQUESTS}
. _{DISPLAY OF THE 25TH STATUS ROW}
. _{MICROPROCESSOR CONTROL VIA AN I}²_C
BUS (SLAVE ADDRESS 0010001 R/W)
. DATA ACQUISITION AVAILABLE FROM
LINES 2 TO 22 OR FROM A COMPLETE
FIELD
. HIGH QUALITY DISPLAY USING A CHARAC-
TER MATRIX OF 12 x 10 DOTS
. _{SINGLE + 5V SUPPLY VOLTAGE}
. _{ON-CHIP MASK PROGRAMMABLE ROM}
CHARACTER GENERATORS
. _{HCMOS PROCESS}
DIP40
(Plastic Package)
ORDER CODE : STV5345 West European
STV5345/H East European
STV5345/T Turkish & European
PIN CONNECTIONS
V_{D D}
1
A11
2
A12
3
OE
4
WE
5
40
A 10
39
A9
38
A8
37
A7
36
A6
TTD
6
35
A5
DESCRIPTION
The STV5345 is a HCMOS integrated circuit which
performs all the processing of logical data within a
625 lines system teletext decoder. It is designed to
operate in conjunction with one-chip : the SAA5231
integrated chip which extracts Teletext information
embedded in a composite video signal. Up to 8
pages of display data can be stored in internal
memory. Using 8Kbytes of external memory leads
to a 16 pages application. A complete system also
comprises a microprocessor controlling the
STV5345 via a 2-wires serial bus. An on-chip ROM
memory contains the character sets. The STV5345
performs automatic selection of one of up to six
natural languages. Data bytes may be decoded in
either 7-Bit plus parity or in full 8-Bit formats. The
chip set also supports facilities for reception and
display of higher-level protocol data.
TTC
7
ODD/EVEN
8
F6
9
VCS
10
SAN D
11
TCS/SCS
12
R
13
G
14
B
15
COR
16
B LA N
17
Y
18
SCL
19
SDA
20
34
A4
33
A3
32
A2
31
A1
30
A0
29
D7
28
D6
27
D5
26
D4
25
D3
24
D2
23
D1
22
D0
21
V _SS
April 1994
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