DESCRIPTION
The STV5345is 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 containsthe character sets. The STV5345 performs automatic selection of one of up to six natural languages. Data bytes may be decodedin 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.

. COMPLETE TELETEXT DECODER INCLUDING ON-CHIP 8 PAGES MEMORY, REDUCING EMC RADIATIONS
. UPWARD SOFTWARE AND HARDWARE COMPATIBLE WITH PREVIOUS SGS-THOMSON’s DECODER SDA5243
. DIRECT INTERFACE TO AN EXTERNAL STATIC RAM OF 8kBYTES FOR UP TO 16 PAGES APPLICATION
. AUTOMATIC SELECTION OF UP TO SIX NATIONAL LANGUAGES
. FOUR SIMULTANEOUS PAGE REQUESTS
. DISPLAY OF THE 25TH STATUS ROW
. MICROPROCESSOR CONTROL VIA AN I2C BUS (SLAVE ADDRESS 0010001 R/W)
. DATA ACQUISITION AVAILABLE FROM LINES 2 TO 22 OR FROM A COMPLETE FIELD
. HIGH QUALITY DISPLAY USING A CHARACTER MATRIX OF 12 x 10 DOTS
. SINGLE + 5V SUPPLY VOLTAGE
. ON-CHIP MASK PROGRAMMABLE ROM CHARACTER GENERATORS
. HCMOS PROCESS