HD66712 Datasheet, PDF (82/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver

HD66712U
13. R_COM is the resistance between the power supply pins (V_CC, V1, V4, V5) and each common signal pin
(COM0 to COM33).
R_SEG is the resistance between the power supply pins (V_CC, V2, V3, V5) and each segment signal pin
(SEG1 to SEG60).
14. The following graphs show the relationship between operation frequency and current consumption.
V_CC = 5V
1.8
1.6
1.4
1.2
max.
1.0
0.8
0.6
typ.
0.4
0.2
0.0
0
100 200 300 400 500
f_OSC or f_cp (kHz)
V_CC = 3V
0.9
0.8
0.7
0.6
max.
(normal mode)
0.5
0.4
0.3
typ.
(normal mode)
0.2
typ.
0.1
(low power mode)
0.0
0
100 200 300 400 500
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 ground, and the IM or EXT pin must also be connected to V_CC or
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}
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