HD66710 Datasheet, PDF (69/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
13. RCOM is the resistance between the power supply pins (V_CC, V1, V4, V5) and each common signal
pin (COM1 to COM33).
RSEG is the resistance between the power supply pins (V_CC, V2, V3, V5) and each segment signal pin
(SEG1 to SEG40).
14. The following graphs show the relationship between operation frequency and current consumption.
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
V_CC = 5V
max.
typ.
100 200 300 400 500
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
V_CC = 3V
max.
typ.
typ. (LP mode)
100 200 300 400 500
f_OSC or f_cp (kHz)
f_OSC or f_cp (kHz)
15. Applies to the OSC1 pin.
16. Each COM and SEG output voltage is within ±0.15V of the LCD voltage (V_CC, V1, V2, V3, V4, V5)
when there is no load.
17. The TEST pin must be fixed to the ground, and the EXT or V_CC pin must also be connected to the
ground.
18. Booster characteristics test circuits are shown below.
Boosting twice
Boosting three times
V_CC
Vci
C1
C2
V5OUT2
+ ^{1 µF}
Rload
I_O
+ ^{1 µF}
V_CC
Vci
C1
C2
V5OUT2
+ ^{1 µF}
Rload
I_O
+ ^{1 µF}
V5OUT3
GND
V5OUT3
GND
+ ^{1 µF}
359