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ST92195 ST92T195 ST92E195 - ON SCREEN DISPLAY (OSD)
ON SCREEN DISPLAY (Cont’d)
7.4.4 Programming the Display
All the characteristics of the display are managed
by programmable attributes:
s
Global Attributes
s
Serial Attributes
s
Parallel Attributes (active until a superseding
serial or parallel attribute).
s
Cursor Control
s
Scrolling Control
7.4.4.1 Global Attributes
These global attributes are defined through their
corresponding registers (see the Register Descrip-
tion).
Table 18. Global Attributes
Global Attributes
Description
Control
Register
Display Enable (DE)
0= Display Off (Default)
1= Display On
DCM0R
R250 (FAh)
Page 32
4/3 or 16/9 Format (SF)
0= 4/3 Screen Format (Default)
1= 16/9 Screen Format
DCM0R
Conceal Enable (CE)
0= Reveal any text defined as concealed by serial attributes (Default)
1= Conceal any text defined as concealed by serial attributes
DCM0R
Fringe Enable (FRE)
0= Fringe Disabled (Default)
1= If SWE in NCSR register is reset, it acts as Fringe enable (toggle with
serial attribute 1Bh). Active on the whole page but not in 80-character
mode.
DCM0R
Global Fringe Enable (GFR)
0= Global fringe mode off
1= Display all text in page in fringe mode
DCM0R
Global Rounding Enable
(GRE)
0= Disabled (Default)
1= Rounding active on the whole page but not in 80-character mode.
DCM0R
Semi-transparent Mode
(STE)
0=Disabled (default)
1=Enabled
The Fast Blanking signal is toggled with the double pixel clock rate on Back-
ground and full screen area in 40 character mode.
Note: Semi-transparent mode shows a visible grid on screen.
DCM0R
Translucency (HTC and
TSLE)
The TSLU signal is active when the OSD displays the background and full
screen area and is inactive during foreground or if no display. This output
pin is used with a Chroma processor to mix the video input with the RGB to
get full translucency.
NCSR R245
(F5h) Page
32 and FSC-
CR R243
Page 32
Half-Tone (HTC and TSLE)
The HT signal is active when the OSD displays the background and full
screen area and is inactive during foreground or if no display. The HT signal
is used with a video processor to perform a contrast reduction.
NCSR R245
(F5h) Page
32 and FSC-
CR R243
Page 32
40/80 Chars/Row (S/D)
0=Single page (40 Characters per row) (default)
1= Two pages are displayed contiguously (80 Characters per row). In this
mode, only serial mode is available.
DCM0R
Fast Blanking Active Level
0=Display when Fast Blanking output is low (default)
1=Display when Fast Blanking output is high
DCM1R
R251 (FBh)
Page 32
Serial/Parallel Mode (SPM)
0= Serial Mode (Default)
1= Parallel Mode
DCM1R
Page or Line Display Mode
(PM)
0 = Full Page Mode (Default) 23 lines plus 1 header and two status lines.
1= Line Mode
DCM1R