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STV9937 Fiches technique(PDF) 17 Page - STMicroelectronics

No de pièce STV9937
Description  120-MHz On-Screen Display for Monitors including PictureBooSTTM and 4 True Independent Window Displays
PDF  49 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV9937 Fiches technique(HTML) 17 Page - STMicroelectronics

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STV9937
Window Specifications
3.5
Window Background Color
The window background color for each separate OSD window is coded over 4 bits as shown in
Table 13. The first bit (Ti) specifies whether the background is transparent or if a color is displayed.
If the background is transparent (Ti = 1), the active video is displayed as background.
If a color is displayed (Ti = 0), the background color for each separate OSD window is coded over
the last three bits (RWi, GWi and BWi, respectively). Windows are displayed with a white
background by default (7h).
3.6
Window Bordering and Shadowing Effects
3.6.1
Enable Bordering or Shadowing Effects
Bordering or shadowing effects are enabled for each separate OSD window by bits ENBS1,
ENBS2, ENBS3 and ENBS4, respectively.
3.6.2
Bordering or Shadowing Selection
Either the bordering or the shadowing effect is selected for each separate OSD window by bits
BSW1, BSW2, BSW3 and BSW4, respectively.
Window 3
6463
Window 4
3744
Table 13: Background Color of Each Window
FWR
FAC
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
80h
10h, 15h
1Ah, 1Fh
7h, 7h,
7h, 7h
Ti
RWi
GWi
BWi
Table 14: Bordering and Shadowing Parameter Selection
Bit
Description
ENBSi
0: No Bordering, No Shadowing (Default Value)
1: Bordering or Shadowing is selected.
BSWi
0: Bordering is selected (Default Value)
1: Shadowing is selected.
Table 15: Enable Bordering or Shadowing Effects
FWR
FAC
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
80h
07h
0h
ENBS4
ENBS3
ENBS2
ENBS1
80h
10h, 15h
1Ah, 1Fh
0h, 0h,
0h, 0h
BSWi
Table 12: Example of Origin and Size of Windows
Window i
HD
VD
HSWi
VSWi



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