參數(shù)資料
型號: HD66751
廠商: Hitachi,Ltd.
英文描述: 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
中文描述: 128 × 128點圖形LCD控制器/驅(qū)動器,四灰度函數(shù)
文件頁數(shù): 90/96頁
文件大?。?/td> 2068K
代理商: HD66751
HD66750/1
90
10. Applies to the internal oscillator operations using external oscillation resistor Rf (figure 59 and table
28).
OSC1
OSC2
Rf
Since the oscillation frequency varies depending on the OSC1 and OSC2 pin
capacitance, the wiring length to these pins should be minimized.
Figure 59 Internal Oscillation
Table 28 External Resistance Value and R-C Oscillation Frequency (Referential Data)
External
R-C Oscillation Frequency: fosc
Resistance (Rf)
Vcc = 1.8 V
Vcc = 2.2 V
Vcc = 3.0 V
Vcc = 4.0 V
200 k
270 k
300 k
330 k
360 k
390 k
430 k
470 k
86 kHz
111 kHz
130 kHz
140 kHz
70 kHz
86 kHz
100 kHz
108 kHz
64 kHz
79 kHz
92 kHz
98 kHz
60 kHz
74 kHz
86 kHz
91 kHz
57 kHz
69 kHz
79 kHz
84 kHz
54 kHz
64 kHz
74 kHz
78 kHz
49 kHz
59 kHz
67 kHz
71 kHz
46 kHz
54 kHz
61 kHz
65 kHz
11. Booster characteristics test circuits are shown in figure 60.
(Five to seven times boosting
Vcc
1
μ
F
Vci
C1+
C1-
C2+
C2-
C3+
+
GND
VLOUT
V
LCD
1
μ
F
+
1
μ
F
1
μ
F
C3-
C4+
C4-
+
+
C5+
C5-
C6+
C6-
1
μ
F
+
1
μ
F
+
1
μ
F
+
Figure 60 Booster
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