Epson E0C6011 Development Manual page 19

4.5 V LCD Panel
1/4, 1/3 or 1/2 duty, 1/3 bias
V
DD
V =V
L1 SS
V =2V
L2 L1
V =3V
L3 L1
V
SS
Note: V and V
L1 SS
3 V LCD Panel
1/4, 1/3 or 1/2 duty, 1/2 bias
V
DD
V =V
L1 SS
V =V
L2 SS
V =2V
L3 L1
V
SS
Note: V and V
L1 SS
Fig. 3.3.9 External elements for LCD power supply circuit
12 Segment memory address
*** OPTION NO.12 ***
--- << SEGMENT MEMORY ADDRESS SELECT >> ---
PLEASE SELECT NO.(1) ? 2
E0C6011 DEVELOPMENT TOOL MANUAL
V
DD
V
L1
C2 0.1µF
V
L2
LCD
C3 0.1µF
V
L3
voltage
circuit
CA
1.5 V
C1
CB
0.1µF
V
SS
are shorted internally.
V
DD
V
L1
V
L2
LCD
C2 0.1µF
V
L3
voltage
circuit
CA
1.5 V
C1
CB
0.1µF
V
SS
are shorted internally.
1. 40H-6FH
2. C0H-EFH
2. C0H-EFH SELECTED
3 FUNCTION OPTION GENERATOR FOG6011
The LCD drive bias is decided according to the LCD
voltage selection of Option 1.
When 4.5 V LCD is selected, the LCD drive bias is
set to 1/3 (drives LCD with 4 levels, V
and V ). When 3 V LCD is selected, the LCD drive
L3
bias is set to 1/2 (drives LCD with 3 levels, V
= V and V ).
L2 L3
Figure 3.3.9 shows the external element configuration
for the LCD voltage selected by Option 1.
The LCDON register (0FFH•D0) is used for turning
the LCD display ON and OFF.
Select the segment memory area.
When "40H–6FH" is selected for the segment
memory area, it is possible to read and write from/to
this area because a RAM is assigned to this area.
When "C0H–EFH" is selected, this segment memory
area becomes a write-only area.
EPSON
, V , V
DD L1 L2
, V
DD L1
15