參數(shù)資料
型號(hào)： HD66740TB0
廠商： Hitachi,Ltd.
英文描述： 50/MDR/RECP/VERT PRS FIT/M2.6/SCW/30MIN
中文描述： 112 × 80點(diǎn)圖形LCD控制器/驅(qū)動(dòng)器
文件頁數(shù)： 68/95頁
文件大?。?/td> 856K
代理商： HD66740TB0
HD66740
68
Partial-display-on Function
The HD66740 can program the liquid crystal display drive duty ratio setting (NL3-0 bits), liquid crystal
display drive bias value selection (BS2-0 bits), boost output level selection (BT1/0 bit) and contrast
adjustment (CT5-0 bits). For example, in the 10-line display mode (1/80 duty ratio), the HD66740 can
selectively drive only the center of the screen or only the top or bottom of the screen by combining these
register functions and the centering display (CN1–0 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 four-line display of a calendar
or time, or the display of only graphics icons (pictograms) at the top or bottom of the screen, 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. This reduces output multiplying
factors in the booster and greatly controls consumption current.
Table 26 Partial-display-on Function (10-line Display)
Item
Normal 10-line Display
Partial-on Display (Limited 4-line Display)
LCD screen
10th line displayed
Only four lines on the
center of the screen
(from the 3rd to 6th lines)
Only four lines at the top
and bottom of the screen
(from the 1st to 3rd and
10th lines)
LCD drive position
shift
Not necessary
(CN1–0 = 00)
Necessary
(CN1–0 = 01)
Necessary
(CN1–0 = 01)
LCD drive duty ratio
1/80 (NL3–0 = 1001)
1/32 (NL3–0 = 0011)
1/32 (NL3–0 = 0011)
LCD drive bias
value (optimum)
1/10 (BS2-0 = 000)
1/6 (BS2-0 = 101)
1/6 (BS2-0 = 101)
LCD drive voltage*
12 V to 15 V
(adjustable using CT5–0)
6 V to 8 V
(adjustable using
CT5–0)
6 V to 8 V
(adjustable using
CT5–0)
Boosting output
multiplying factor
Five times (BT1–0 = 10)
Triple (BT1–0 = 00)
Triple (BT1–0 = 00)
Frame frequency
(fosc = 90 kHz)
Note:
The LCD drive voltage depends on the LCD materials which are actually used. Since the LCD
drive voltage is high when the LCD drive duty ratio is high, a low duty ratio is suitable for low-power
consumption.
70 Hz
88 Hz
88 Hz
相關(guān)PDF資料
PDF描述
HD66740WTB0 112 x 80-dot Graphics LCD Controller/Driver
HD66751 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66750TB0 122 x 32 pixel format, Compact LCD size
HD66750 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66751TB0 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66740WTB0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:112 x 80-dot Graphics LCD Controller/Driver
HD66741 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
HD66750 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
HD66750TB0 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
HD66751 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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*