參數(shù)資料
型號： HD66726
廠商： Hitachi,Ltd.
英文描述： Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器)
中文描述： 圖形液晶顯示控制器/鍵掃描功能（帶鍵掃描功能的圖形液晶顯示控制器/驅(qū)動器驅(qū)動程序）
文件頁數(shù)： 97/117頁
文件大?。?/td> 1549K
代理商： HD66726
HD66726
97
Partial-display-on Function
The HD66726 can program the liquid crystal display drive duty ratio setting (NL2-0 bits), liquid crystal
display drive bias value selection (BS2-0 bits), boost output level selection (BT1/0 bit) and contrast
adjustment (CT4-0 bits). For example, in the four-line display mode (1/34 duty ratio), the HD66726 can
drive only two lines in the center of the screen by combining these register functions and the centering
display (CEN bit) function. This is called partial-display-on. Lowering the liquid crystal display drive
duty ratio as required saves the liquid crystal display drive voltage, thus reducing internal current
consumption. This is suitable for calendar or time display, which needs to be continuous in the system
standby state with minimal current consumption. Here, the non-displayed lines are constantly driven by the
unselected level voltage, thus turning off the LCD for the lines.
In general, lowering the liquid crystal display drive duty ratio decreases the optimum liquid crystal display
drive voltage and liquid crystal display drive bias value.
Table 46 Partial-display-on Function (4-line Display)
Item
Normal 4-line Display
Partial-on Display
Character display
4th line displayed
Only one line in the
center of the screen
Only two lines in the
center of the screen
Segment display
Possible
Possible
Possible
Centering display
Not necessary (CEN = 0)
Possible (CEN = 1)
Possible (CEN = 1)
LCD drive duty ratio
1/34 (NL2/1/0 = 100)
1/10 (NL2/1/0 = 001)
possible
1/18 (NL2/1/0 = 010)
possible
LCD drive bias
value (optimum)
1/6 (BS2-0 = 010)
1/4 (BS2-0 = 110)
1/5 (BS2-0 = 100)
LCD drive voltage
Adjustable using BT1/0
and CT4-0
Adjustable using BT1/0
and CT4-0
Adjustable using BT1/0
and CT4-0
Frame frequency
(fosc = 50 kHz)
74 Hz
74 Hz
73 Hz
相關(guān)PDF資料
PDF描述
HD66727 Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器)
HD66728 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點(diǎn)圖形LCD控制器)
HD66730 Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動器)
HD66731 Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動器)
HD66731A00TB0L 122 x 32 pixel format, Compact LCD size
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66726A03TB0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC
HD66727 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66727A03 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66727A03BP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66727A03TA0 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
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