參數(shù)資料
型號(hào)： HD66717
廠商： Hitachi,Ltd.
元件分類(lèi)： 晶體
英文描述： (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
中文描述： （低功耗點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器）
文件頁(yè)數(shù)： 73/90頁(yè)
文件大?。?/td> 716K
代理商： HD66717
HD66717
525
Partial-Display-Off Function
The HD66717 can program the number of display lines (NL1 and NL0 bits), divide the internal operating
frequency by four (OSC bit), and adjust the display contrast (CT bit). Combining these functions, the
HD66717 can turn off the second and/or subsequent lines, displaying only the characters in the first line
to reduce internal current consumption (partial-display-off function). This function is suitable for
calendar or time display, which needs to be continuous during system standby with minimal current
consumption. Here, the second to fourth non-displayed lines are constantly driven by the deselection level
voltage, thus turning off the LCD for the lines.
Note that internal clock frequency is reduced to a quarter, quadrupling execution time of each instruction;
MPU data transfer rate must be appropriately adjusted.
Table 26 lists partial-display-off function specifications and Figure 44 shows a sample display using the
partial-display-off function.
Table 26
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
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) .
78 Hz
66 Hz
相關(guān)PDF資料
PDF描述
HD66717A03TA0 (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
HD66724 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)
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)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66717A03TA0 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:(Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
HD66720 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66720A01TF 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
HD66724 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66724/HD66725 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
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