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4: FUNCTION DESCRIPTION
4.1.8
Attribute Display using the Layered Function
The S1D13700 provides a means of increasing the ability of expression on a monochrome liquid crystal
display. More specifically, it uses the OVLAY and DISP ON/OFF commands to display characters in inverse
video, produce halftone menu pads, and flash a given screen area for various highlighting effects as shown
below.
Highlighting effects
Inverse
Halftone display
Area flashing display
Rules and underlining
Use of the S1D13700's layered function will efficiently accomplish the highlighting effects above. The
following describes a few examples of using this function to realize highlighting effects. Not all such effects
can be used within the same screen block, however.
(1) Inverse
1 Using the layered function
[Exclusive OR'ing of first layer (text) and second layer (graphics)]
1-1 CSRW
CSDIR
MWRITE
1-2 OVLAY
1-3 DISP ON/OFF
68
MX1 MX0
0
1
1
1
0
0
1
1
0
0
0
1
0
0
0
1
1
1
Write turn-on data "1" to the entire graphic area where characters are
to be displayed in inverse video.
Specify an overlay method using the OVALY command so that the first
MX0 = "1"
and second layers will be exclusive OR'd.
MX1 = "0"
Turn display of the first and second layers on using the DISP ON/OFF
command. → Characters are displayed in inverse video.
FP0 = FP2
= "1"
FP1 = FP3
= "0"
First layer,
Screen
single screen
IV
IV
EPSON
ME
Yes, No
ME
BL
BL
Error
LINE
RL
RL
LINE
EPSON
Second layer,
single screen
EPSON
Yes, No
Error
LINE
LINE
S1D13700 Technical Manual
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