參數(shù)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(qū)動器(112 × 80點圖形液晶顯示控制器)
文件頁數(shù): 82/138頁
文件大?。?/td> 2158K
代理商: HD66728
HD66728
82
C1+
C1-
C2+
C2-
C3+
C3-
C4+
C4-
Vci
VLOUT
V
LCD
V1OUT
V2OUT
V3OUT
V4OUT
V5OUT
-+
-+
-+
-+
-+
GND
Booster
HD66728
OPOFF = Vcc
VR
R
6R
R
R
R
GND
COM1 to COM80
V1
V2
V3
V4
V5
GND
LCD
driver
SEG1 to SEG112
V
LCD
Notes: 1. Resistance of each external bleeder resistor should be 2 k
to 10 k
.
2. When 0.1
μ
F to 0.5
μ
F capacitors are added in parallel with each external bleeder resistor,
resistance can be increased, and the through current in the bleeder resistors can be reduced
(see figure 47).
3. The bias current value for driving LCDs can be varied by adjusting the resistance (6R) between
the V3OUT and V4OUT pins.
4. The internal contrast adjuster is disabled; contrast must be adjusted either by controlling the
external variable resistor between VLCD and V1 for the booster.
5. Vci is both a reference voltage and power supply for the booster; connect it to Vcc directly or
combine it with a transistor so that sufficient current can be obtained.
Figure 46 Circuit Using External Bleeder Resistors
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參數(shù)描述
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