參數(shù)資料
型號: HD66724
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(dòng)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(dòng)器驅(qū)動(dòng)程序)
文件頁數(shù): 96/117頁
文件大?。?/td> 834K
代理商: HD66724
HD66724/HD66725
96
Partial-Display-On Function
The HD66724/HD66725 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). In the three-line display mode (1/26 duty ratio), the HD66724/HD66725 can
drive only one line 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 deselection 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 47 Partial-Display-On Function
Item
Normal 3-Line Display
Partially-On Display
Character display
1st to 3rd lines displayed
Only one line in the center of the
screen
Segment display
Possible (144)
Possible (144)
Centering display
Not necessary (CEN = 0)
Possible (CEN = 1)
LCD drive duty ratio
1/26 (NL2/1/0 = 011)
1/10 (NL2/1/0 = 001) possible
LCD drive bias value (optimum)
1/6 (BS2-0 = 001)
1/4 (BS2-0 = 101)
LCD drive voltage
Adjustable using BT1/0 and
CT4-0
Adjustable using BT1/0 and CT4-0
Frame frequency (fosc = 32 kHz)
77 Hz
80 kHz
相關(guān)PDF資料
PDF描述
HD66725 Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
HD66726 Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
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(dòng)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(dòng)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66724/HD66725 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD66724RA03TA0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD CONTROLLER
HD66725 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:112 x 80-dot Graphics LCD Controller/Driver
HD66725A03TA0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD CONTROLLER
HD66726 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