Lucent Technologies MN102F85K User Manual

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The MN102H75K/85K OSD achieves a shuttering effect using four pro-

grammable shutters— two vertical and two horizontal. With this feature, you can 
shutter any portion of the OSD display, or you can combine shuttering with a 

wipe-out effect to create a smooth appearing and disappearing effect.

To prevent flickering and shadows on the display, only write to the registers 

during the VSYNC cycle.

The register settings for the two vertical shutters, VSHT0 and VSHT1, and the 

two horizontal shutters, HSHT0 and HSHT1, control which area of the screen is 

shuttered. Table 7-12 shows the register settings required for this function, and 
figure 7-31 shows four setup examples.

■

The top edge of the television screen is x’000’. Each integer higher brings the 

shutter position down one H scan line.

■

The left edge of the television screen is x’000’. Each integer higher brings the 

shutter position right one pixel. (One pixel, or one dot, is the smallest display unit 
in the OSD.)

Shutter enable/disable

VSON0

VSON1

HSON0

HSON1

0:Disable shutter (Acts as though there are no 

shutter lines.)

1:Enable shutter

Shutter position

VST00–

VST09

VST10 –

VST19

HST00 –

HST09

HST10–

HST19

For vertical shutters, this is the number of H scan 

lines from the top of the screen. For horizontal 

shutters, it is the number of pixels from the left of 
the screen.

Shuttering direction

VSP0

VSP1

HSP0

HSP1

0:Shutter below (vertical shutters) or to the right 

(horizontal shutters)

1:Shutter above (vertical shutters) or to the left 

(horizontal shutters)

Shuttering mode control

SHTRAD

(shared bit)

0:AND the shuttered areas of all the shutters

1:OR the shuttered areas of all the shutters