參數(shù)資料
型號: HD66760
廠商: Hitachi,Ltd.
英文描述: 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors
中文描述: 104 × 80點圖形LCD控制器/驅(qū)動器的256色
文件頁數(shù): 67/105頁
文件大小: 653K
代理商: HD66760
HD66760
67
Oscillation Circuit
The HD66760 can oscillate between the OSC1 and OSC2 pins using an internal R-C oscillator with an
external oscillation resistor. Note that in R-C oscillation, the oscillation frequency is changed according to
the external resistance value, wiring length, or operating power-supply voltage. If Rf is increased or power
supply voltage is decrease, the oscillation frequency decreases. For the relationship between Rf resistor value
and oscillation frequency, see the Electric Characteristics Notes section.
OSC1
OSC2
Rf
HD66760
Note: Put the Rf resistor as close
as possible to the OSC1 and
OSC2 pins.
Figure 45 Oscillation Circuits
Table 35 Relationship between Liquid Crystal Drive Duty Ratio and Frame Frequency
LCD Duty
NL4–0 Set Value
Recommended
Drive Bias Value
Frame Frequency
One-frame Clock
1/16
01H
1/5
70 Hz
2560
1/24
02H
1/6
70 Hz
2560
1/32
03H
1/6
70 Hz
2568
1/40
04H
1/7
70 Hz
2560
1/48
05H
1/8
71 Hz
2544
1/56
06H
1/8
70 Hz
2576
1/64
07H
1/9
70 Hz
2560
1/72
08H
1/9.5
71 Hz
2520
1/80
Note:
09H
1/10
70 Hz
2560
The frame frequency above is for 180-kHz operation and proportions the oscillation frequency (fosc).
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