ViewSonic ViewPanel VGI50 Service Manual page 26

ViewSonic Service Manual
April 1999 - Version 1.0 VG150
THEORY OF CIRCUIT OPERATION
Description
as cee ee ae Offset factor used when generator look up
table for current even pixel multiplication
ee ee eee | Offset factor used when generator look up
table for current odd pixel multiplication
Pee, od 143H | Offset factor used when generate look up
table for next even pixel multiplication
Racine ee ee Offset factor used when generate look up
table for next odd pixel multiplication
een ie (a Scale factor used when generate look up table
for line multiplication
Minimum number of pixels per line for LCD
line for LCD panel
LCD polarity 4 149H[3:0] | Controls the polarity of output VSYNV,
HSYNC, clock and display enable
Bit 0:0: clock active high, 1: clock active low
Bit 1: 0: HSYNC active low, 1: HSYNC active
high
Bit 2: 0: VSYNC active low, 1: VSYNC active
high
Bit 4: 0: de active high, 1: de active low
Horizontal Interpolation Lookup Table
Symbol | Wiath(bits) | Address | Description
interpolation lookup tables. Each table is then
generated by multiply this value With
corresponding scale factor and added with
corresponding offset factor.
bits)
~~ Vertical Interpolation Lookup Table
Symbol | Width(bits) | Address | Description
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