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STV5347DH Datasheet(PDF) 7 Page - STMicroelectronics |
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STV5347DH Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 22 page  FUNCTIONAL DESCRIPTION I - Displayable Page Memory Map The organization of a page-memory is shown in Figure 7. The display area consists of 25 rows of 40 charac- ters per row. The organization is as follows : - Row zero contains the page header : • The first seven characters (0 - 6) are used for messages regarding the operational status. • The eighthcharacteris an alphanumericcontrol character either “white” or “green” defining the “search” status of the page. When it is “white” the operational state is normal and the header appears white ; when it is “green” the opera- tional state corresponds to the “search mode” and the header appears green. • The following twenty-four characters give the header of the requested page when the system is in search mode. • The last eightcharactersdisplay the time of day. - Row number twenty-four is used by the micro- processor for the display of information, or used to display X/24 colored key data according to R0D7 bit. - Row twenty-five comprises ten bytes of control data concerning the received page (see Table 1) and fourteen free bytes which can be used by the microprocessor. 1 724 8 10 14 row free for status (R0D7 = 0) or packet X/24 (R0D7 = 1) 0 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 ROW 8 scrolling time characters 24 characters from page header rolling on page search Fixed characters Alphanumerics white for normal, green on search 7 Status Characters MAIN PAGE DISPLAY AREA 14 bytes free for use by µC 10 bytes for received page information Figure 7 : Page Memory Organization STV5347 - STV5347/H - STV5347/T 7/22 |
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