參數資料
型號： HD66728
廠商： Hitachi,Ltd.
英文描述： 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點圖形LCD控制器)
中文描述： 112 × 80點圖形LCD控制器/驅動器（112 × 80點圖形液晶顯示控制器）
文件頁數： 71/138頁
文件大?。?/td> 2158K
代理商： HD66728
HD66728
71
Oscillation Circuit
The HD66728 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. Consumption current can be
lowered by 10
μ
A in the external clock mode.
1) External clock mode
2) External resistor oscillation mode
OSC1
OSC1
OSC2
Clock
(80 kHz)
It needs the dampping registor
on the external clock line.
1.5 k
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.
HD66728
HD66728
Figure 38 Oscillation Circuits
Table 28
Relationship between Drive Duty Ratio and Frame Frequency (fosc = 75 kHz)
Display mode
1-line
Dis-
play
2-line
Dis-
play
3-line
Dis-
play
4-line
Dis-
play
5-line
Dis-
play
6-line
Dis-
play
7-line
Dis-
play
8-line
Dis-
play
9-line
Dis-
play
10-line
Dis-
play
Set value for NL3–0
LCD Drive
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
Multiplexing
duty ratio
1/8
1/16
1/24
1/32
1/40
1/48
1/56
1/64
1/72
1/80
Drive bias
(recommend-
ed value)
1/4
1/5
1/6
1/6
1/7
1/8
1/8
1/9
1/9.5
1/10
Frame
frequency
73 Hz
73 Hz
73 Hz
73 Hz
72 Hz
74 Hz
74 Hz
73 Hz
65 Hz
59 Hz
One-frame
frequency
Note:
1,024
1,024
1,032
1,024
1,040
1,008
1,008
1,024
1,152
1,280
If the frame frequency is low and the display flickers, increase the oscillation frequency (fosc).
Particularly in the 9-line display and 10-line display modes, note that the frame frequency is lowered.
相關PDF資料
PDF描述
HD66730 Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅動器)
HD66731 Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅動器)
HD66731A00TB0L 122 x 32 pixel format, Compact LCD size
HD66731A00TA0L Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
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相關代理商/技術參數
參數描述
HD66729 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66730 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
HD66730A00FS 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
HD66730A01FS 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
HD66731 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
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