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7-4-2. LCD Mode
The 640x200 dots LCD panel can be connected.
-
P C-7200
ille
6pthaM~
IiblqueliCy Of Ule1\7lri,1128B
Is
calcatated-aS"'fot'klo ... ' 1 " s r . - . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1-Panel LCD
LCDCLK~
16.257MHz
x2l3~
1 O.84MHz
CHACLK~10.84MHz
I
8~1.355MHz
2-Panel LCD
LCDCLK~16.257MHzx2l3+2~5.42MHz
CHACLK~5.42MHz
I
8~677.5KHz
The values to set to the MN1288 registers are the same as CRT
mode. (Figure 7-4) When the VPLMT is 'H', the number of vertical
raster is
200
rasters.
The ROMADR signal controls the character font patterns.
The display size calculated by the values of Figure 7-4 is shown in
Figure 7-6.
98 Characters (784 Dots)
80 Characters (640 Dots)
18
Rasters
w
'Ui
~
-
~
~
~
~
w
00
~
' "
' "
~
-
8 Dots
Horizontal
<:>
~
<:>
Retrace
'"
'"
~
~
Period
w
00
~
~
Di splay Area
:.:i
:.:i
"'
w
I .....
t.£o!
'"
Vertical Retrace Period
-,,-
Figure 7-6. Display size in the LCD mode
The frame frequency=66.5Hz
The underline is displayed when the raster address is hex 07H.
The underline is overlapped by cursor when the values in Figure
7~4
are set to the MN1288 registers.
7-24
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