HD44780U Datasheet, PDF (56/59 Pages) Hitachi Semiconductor – Dot Matrix Liquid Crystal Display Controller/Driver

HD44780U
13. RCOM is the resistance between the power supply pins (V_CC, V1, V4, V5) and each common signal pin
(COM1 to COM16).
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 = 5 V
max.
typ.
100 200 300 400 500
f_OSC or f_cp (kHz)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
V_CC = 3 V
max.
typ.
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 ±0.15 V of the LCD voltage (V_CC, V1, V2, V3, V4, V5)
when there is no load.
56