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參數(shù)資料
| 型號： | HD66727 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 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) |
| 中文描述： | 低功耗點陣液晶顯示控制器/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)： | 85/98頁 |
| 文件大?。?/td> | 1576K |
| 代理商： | HD66727 |
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HD66727
85
Table 38
Partial-Display-Off Function
Function Item
Normal 4-Line Display
Partially-Off Display
Character display
1st to 4th lines displayed
Only 1st line displayed
Segment display
Possible
Possible
Annunciator display
Possible
Possible
R-C oscillation frequency
160 kHz
160 kHz
Internal operating frequency
160 kHz (OSC = 0)
40 kHz (OSC = 1)
LCD single-line drive frequency
2.7 kHz (1/34 duty ratio)
0.7 kHz (1/10 duty ratio)
Frame frequency
78 Hz
66 Hz
Key scan cycle
320 to 2,560 clock cycles
(Clock cycle = 1 / internal
operating frequency)
160 to 1,280 clock cycles
(Clock cycle = 1 / internal
operating frequency)
Note:
Select an optimum LCD drive voltage (between V
and V5) for the multiplexing duty ratio used,
using a reference voltage input pin (Vci) for the booster or the contrast adjust bits (CT) .
Display available
(driven with selection
level)
Display available
(driven with selection
level)
Display unavailable
(driven with
deselection level)
Figure 49 Example of Partially-Off Display (date and time indicated)
Sleep Mode
Setting the sleep mode bit (SLP) to 1 puts the HD66727 in the sleep mode, where the device halts all the
internal display operations except for annunciator display and key scan operations, thus reducing current
consumption. Specifically, character and segment displays, which are controlled by the multiplexing drive
method, are completely halted. Here, all the SEG (SEG1 to SEG60) and COM (COM1 to COM34) pins
output the V
CC
level, resulting in no display. If the AMP bit is set to 0 in the sleep mode, the LCD drive
power supply can be turned off, reducing the total current consumption of the LCD module.
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相關(guān)代理商/技術(shù)參數(shù) |
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| HD66727A03TA0L | 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 |
| HD66727A04 | 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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