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參數(shù)資料
| 型號(hào)： | HCD66751BP |
| 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(diǎn)圖形LCD控制器/驅(qū)動(dòng)器，四灰度函數(shù) |
| 文件頁數(shù)： | 49/96頁 |
| 文件大小： | 2068K |
| 代理商： | HCD66751BP |
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HD66750/1
49
Oscillation Circuit
The HD66750/1 can either be supplied with operating pulses externally (external clock mode) or oscillate
using an internal R-C oscillator with an external oscillator-resistor (external resistor oscillation mode).
Note that in R-C oscillation, the oscillation frequency is changed according to the internal capacitance
value, the external resistance value, or operating power-supply voltage.
1) External clock mode
2) External resistor oscillation mode
OSC1
OSC1
OSC2
Clock
(70 kHz)
Rf
The oscillator frequency can be
adjusted by oscillator resistor
(Rf). If Rf is increased or power
supply voltage is decreased, the
oscillation frequency decreases.
For the relationship between Rf
resistor value and oscillation
frequency, see the Electric
Characteristics Notes section.
HD66750/1
HD66750/1
Dumping resistance
(1.5 k
)
Figure 32 Oscillation Circuits
Table 18
Relationship between Liquid Crystal Drive Duty Ratio and Frame Frequency
LCD Duty
NL3D0 Set Value
Recommended
Drive Bias Value
Frame
Frequency
One-frame Clock
1/16
0001
1/6
70 Hz
1024
1/24
0010
1/6
70 Hz
1032
1/32
0011
1/6
70 Hz
1024
1/40
0100
1/7
69 Hz
1040
1/48
0101
1/8
71 Hz
1008
1/56
0110
1/8
71 Hz
1008
1/64
0111
1/9
70 Hz
1024
1/72
1000
1/9.5
71 Hz
1008
1/80
1001
1/10
69 Hz
1040
1/88
1010
1/10
68 Hz
1056
1/96
1011
1/10
68 Hz
1056
1/104
1100
1/11
69 Hz
1040
1/112
1101
1/11
71 Hz
1008
1/120
1110
1/11
67 Hz
1080
1/128
1111
1/11
70 Hz
1024
Note:
The frame frequency above is for 72-kHz operation and proportions the oscillation frequency (fosc).
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