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On-Screen Display
Setting Up the OSD
When setting up the horizontal
position, you must allow at least
0.8 µs between the end of a line
and the leading edge of HSYNC,
or the display will flicker.
MN102H75K/F75K/85K/F85K LSI User Manual
7.10.4 Setting Up the OSD Display Position
This section describes how to control the positioning of the OSD.
To set up the horizontal position:
Cursor
Write the horizontal position of the cursor to the SHP[9:0] field
(x'007F12').
Valid range: SHP
Graphics
Write the horizontal position of the first line in the display to the
GIHP[9:0] field (x'007F16').
Write the position of the second and all following lines in the GHP[9:0]
field of the graphics display RAM data for the preceding line.
Valid ranges: x'0C'
Text
Write the horizontal position of the first line in the display to the
CIHP[9:0] field (x'007F1A').
Write the position of the second and all following lines in the CHP[9:0]
field of the text display RAM data for the preceding line.
Valid ranges: x'0C'
To set up HP
equations, write:
max
HP
= (T
max
hsync
HP
= 1024
(N
max
T
is the HSYNC cycle, T
hsync
of characters in the line including repeated characters and blank spaces, T
the dot clock cycle, and H
sz
there is at least 0.8 µs between the end of a line and the leading edge of HSYNC.
T
hw
HSYNC
RGB, YM, YS
Figure 7-29 HP
About the horizontal start position on the screen
The horizontal position, or HP settings (SHP, GHP, and CHP) determine where
the left side of cursor, graphics, and text lines start on the screen. You can set this
value for all of the layers in 1-pixel units.
189
Panasonic
x'0C'
GHP HP
and x'0C'
max
CHP HP
and x'0C'
max
T
0.8 s)/T
(N
hw
dot
char.
16
H
)
char.
sz
is the HSYNC pulse width, N
hw
is the horizontal size. The HP
T
hsync
of Horizontal Display Position
max
Panasonic Semiconductor Development Company
GIHP
HP
max
CIHP
HP
max
16
H
); or
sz
is the number
char.
is
dot
limit ensures that
max
0.8 s
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