參數(shù)資料
型號(hào)： ML9040-BXXGA
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類： 顯示控制器
英文描述： 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, PQFP80
封裝： 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)： 27/47頁
文件大?。?/td> 435K
代理商： ML9040-BXXGA
ML9040-Axx/-Bxx
Semiconductor
33
Interface with LCD and MSM5259
Display examples when setting the 5 x 7 dots character font 1-line mode, 5 x 10 dots character font
1-line mode, and 5 x 7 dots character font 2-line mode through instructions are shown in Figures
4, 5, and 6, respectively.
When the 5 x 7 dots character font is set in the 1-line display mode, the COM signals COM9 to
COM16 are output for extinguishing.
Likewise, when the 5 x 10 dots character font (1-line is set), the COM signals COM12 to COM16
are output for display-off.
The display example shows a combination of 16 characters (32 characters for the 2-line display
mode) and the LCD. When the number of MSM5259s are increased according to the increase in
the number of characters, it is possible to display a maximum of 80 characters.
Besides, it is necessary to generate bias voltage required for LCD operation by splitting resistors
outside the IC to input it to ML9040-Axx/-Bxx and MSM5259.
Examples of these bias voltages are shown in Figures 7, 8, 9, and 10. Basically, this can be done
by dividing the voltage by the resistors as shown in Figures 7 and 8. If the value of resistor R is
made larger to reduce system power consumption, the LCD operating margin decreases and the
LCD driving waveform is distorted. To prevent this, a by-pass capacitor is serially connected to
the resistor to lower voltage division impedance caused by the splitting of resistors as shown in
Figures 9 and 10.
As the values of R, VR, and C vary according to the LCD size used and VLCD (LCD drive voltage),
these values have to be determined through actual experimentation in combination with the
LCD.
(Example set values: R = 3.3 to 10kW, VR = 10 to 30kW, and C = 0.0022 mF to 0.047 mF)
Figure 17 shows an application circuit for the ML9040-Axx/-Bxx and MSM5259 including a bias
circuit.
The bias voltage has to maintain the following potential relation:
VDD > V1 > V2 ≥ V3 > V4 > V5
Figure 4
In the case of 1-line 16 characters display (5 x 7 dots/font)
COM1
SEG1
SEG40
O1
O40
ML9040-Axx/-Bxx/-Cxx/-Dxx
DO
CP
DF
L
DI1
CP
MSM5259
DF
LOAD
DO20 DI21
LCD
COM8
相關(guān)PDF資料
PDF描述
ML9040A-A01WA 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC81
ML9040A-AXXWA 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC81
ML9040A-BXXGA 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, PQFP80
ML9040A-AXXWA 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC81
ML9040A-BXXWA 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, UUC81
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