SED1330F Datasheet, PDF (137/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

9.5 – 9.5.2.1
9.5 Layered Display Attributes
SED1330F/1335F/1336F incorporates a number of
functions for enhanced displays using monochrome
LCD panels. It allows the display of inverse charac-
ters, half-intensity menu pads and flashing of selected
screen areas. These functions are controlled by the
OVLAY and DISP ON/OFF commands.
9.0 Application Notes
A number of means can be used to achieve these
effects, depending on the display configuration. These
are listed below. Note, however, that not all of these
can be used in the one layer at the same time.
Attribute
MX1
MX0
Combined layer display
1st layer display
2ndt layer display
0
Reverse
1
0
Half-tone
1
0
Local flashing
0
0
Ruled line
0
1
1
IV
1
EPSON
IV
0
ME
1
Yes, No
ME
0
BL
1
Error
BL
0
1
RL
1
LINE
RL
LINE
Figure 88. Layer synthesis
EPSON
Yes, No
LINE
LINE
Error
9.5.1 Inverse Display
The first layer is text, the second layer is graphics.
1. CSRW, CSDIR, MWRITE
Write 1s into the graphics screen at the area to
be inverted.
2. OVLAY: MX0 = 1, MX1 = 0
Set the combination of the two layers to
Exclusive-OR.
3. DISP ON/OFF: FP0 = FP1 = 1, FP1 = FP3 =
0.
Turn on layers 1 and 2.
9.5.2 Half-tone Display
The FP parameter can be used to generate half-
intensity display by flashing the display at 17 Hz. Note
that this mode of operation may cause flicker prob-
lems with certain LCD panels.
9.5.2.1 Menu Pad Display
Turn flashing off for the first layer, on at 17 Hz for the
second layer, and combine the screens using the OR
function.
1. OVLAY: P1 = 00H
2. DISP ON/OFF: P1 = 34H
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