HD66760 Datasheet, PDF (96/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
10. Applies to the internal oscillator operations using external oscillation resistor Rf (figure 63 and table 40).
OSC1
Rf
Since the oscillation frequency varies depending on the OSC1 and OSC2 pin
OSC2
capacitance, the wiring length to these pins should be minimized.
Figure 63 Internal Oscillation
Table 40 External Resistance Value and R-C Oscillation Frequency (Referential Data)
External
Resistance (Rf)
91 kΩ
110 kΩ
130 kΩ
160 kΩ
200 kΩ
240 kΩ
330 kΩ
470 kΩ
R-C Oscillation Frequency: fosc (kHz)
Vcc = 2.2 V
Vcc = 3.0 V
283
337
243
287
212
249
180
209
151
173
131
148
101
113
76
84
Vcc = 3.6 V
359
304
263
220
181
155
117
86
11. The step-up characteristics test circuit is shown in figure 64.
(3 to 6-times step-up)
Vcc Vci
C1+
C1–
C2+
C2–
C3+
C3–
C4+
C4–
C5+
C5–
C6+
C6–
VLOUT
GND ^VLCD
+
1 µF
+
1 µF
+
1 µF
+
1 µF
+
1 µF
+
1 µF
+ _{1 µF}
Figure 64 Step-up Characteristics Test Circuit