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On-Screen Display
Controlling the Shuttering Effect
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
200
Panasonic
7.13.4 Controlling Line Shuttering
It is possible to cancel shuttering of individual lines on the text and graphics
layers so that they will be displayed on both shuttered and non-shuttered regions.
■
To disable shuttering on the next line:
Set the GSHT bit (bit 10 of GHP in the RAM data) and/or the CSHT bit (bit 10 of
CHP in the RAM data) to 1.
■
To disable shuttering on the first line:
Set the GISHT bit of the GIHP register (x’007F16’) and/or the CISHT bit of the
CIHP register (x’007F14’) to 1.
Figure 7-35 shows a setup example for the text layer.
Figure 7-34 Shutter Blanking Setup Examples
Television screen
CCSHT = 0: Shuttering of text disabled
BCSHT = 0: Shuttering of text background disabled
SHTBLK = 1: Shuttered area is blank
VSHT1
VSHT0
Shuttered area
HSHT0
HSHT1
ABCDE
Television screen
CCSHT = 0: Shuttering of text disabled
BCSHT = 0: Shuttering of text background disabled
SHTBLK = 1: Shuttered area is blank
COLBSHT = 1: Color background is shuttered
VSHT1
VSHT0
HSHT0
HSHT1
ABCDE
Color background
Shuttered area is blank (black).
Figure 7-35 Line Shuttering Setup Example
Line 1: CISHT = 1
Shuttering
effect
ABCDEFG
Line 2: CSHT = 0
Line 3: CSHT = 0
Line 4: CSHT = 1
ABCDEFG
ABCDEFG
Television screen