參數(shù)資料
型號: HD667B66R
廠商: Hitachi,Ltd.
英文描述: 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
中文描述: 132 × 176點圖形LCD控制器/驅(qū)動器的65K色
文件頁數(shù): 67/97頁
文件大?。?/td> 681K
代理商: HD667B66R
HD66766R Rev. 1.0-1 / September 2002
67
Oscillation Circuit
The HD66766R 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 decreased, the oscillation frequency decreases. For the relationship between Rf
resistor value and oscillation frequency, see the Electric Characteristics Notes section.
Figure 51 Oscillation Circuits
The relationship between the SEG and COM output levels is as shown in the following figure. While the
display is off, SEG and COM outputs go to GND level.
Figure 52 Relationship with SEG/COM Output Level
1) External clock mode
OSC1
OSC2
Clock
(264kHz)
HD66766R
Damping resistance
(2k
)
Note: The resistance must be located
near the OSC1/OSC2 pins.
Rf
OSC2
HD66766R
2) External resistance
oscillation mode
OSC1
VCH
VS
VM
VSL (GND)
Lit
M
COM waveform
SEG waveform
No lit
Lit
Lit
No lit
No lit
VCL
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