STV5346 데이터 시트보기 (PDF) - STMicroelectronics
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STV5346 Datasheet PDF : 21 Pages
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STV5346 - STV5346/H - STV5346/T
FUNCTIONAL DESCRIPTION
I - Displayable Page Memory Map
The organization of a page-memory is shown in
Figure 6.
The display area consists of 25 rows of 40 charac-
ters per row.
The organizationis as follows :
- Row zero contains the page header :
• The first seven characters (0 - 6) are used for
messages regarding the operational status.
• The eighth character is 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-
Figure 6 : Page Memory Organization
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 eight characters display 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.
7 Status
Characters
Fixed characters
Alphanumerics white
for normal,
green on search
24 characters from page header
rolling on page search
8 scrolling
time characters
ROW
7
1
24
8
0
1
2
3
4
5
6
7
8
9
10
11
MAIN PAGE DISPLAY AREA
12
13
14
15
16
17
18
19
20
21
22
23
row free for status (R0D7 = 0) or packet X/24 (R0D7 = 1)
24
10
14
25
10 bytes for received
page information
14 bytes free
for use by µC
8/21
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