|
HD66717 Datasheet, PDF (52/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver) | |||
|
◁ |
HD66717
VCC
V EE
OPOFF = GND
VCC
R
V2 R
R
V3 R
R
R
VR
VEE
AGND
HD66717
+â
V1
+â
V2
+ V3
â
+ V4
â
+ V5
â
LCD
multiplexing
driver
LCD static
driver
GND
a) 3- or 4-line display with 1/6 bias
SEG1âSEG60
COM1âCOM32
COMS1âCOMS2
ASEG1âASEG10
ACOM
OPOFF = GND
VCC
VCC
R
V2 R
Short-circuited
R
V3 R
R
R
V EE
VR
VEE
AGND
HD66717
+ V1
â
+â
V2
+â
V3
+â
V4
+â
V5
LCD
multiplexing
driver
LCD static
driver
GND
b) 1- or 2-line display with 1/4 bias
SEG1âSEG60
COM1âCOM16
COMS1âCOMS2
ASEG1âASEG10
ACOM
Note: 1. Potential differences between VCC and V1 and between V5 and VEE must be 0.4V or greater,
particularly for low-duty drive such as 1-line display.
2. When the internal operational amplifiers cannot fully drive the LCD panel used, an appropriate capacitor
must be inserted between each output of V1OUT to V5OUT and VCC to stabilize the
operational amplifier output.
Figure 30 External Power Supply Circuit Example for LCD Drive Voltage Generation
504
|
▷ |