參數(shù)資料
型號(hào)： LC75804
廠商： Sanyo Electric Co.,Ltd.
英文描述： 1/3, 1/4 Duty LCD Display Drivers with Key Input Function
中文描述： 1 / 3，1 / 4占空比LCD顯示驅(qū)動(dòng)器，主要輸入功能
文件頁(yè)數(shù)： 23/37頁(yè)
文件大?。?/td> 297K
代理商： LC75804
Voltage Detection Type Reset Circuit (VDET)
This circuit generates an output signal and resets the system when logic block power is first applied and when the voltage
drops, i.e., when the logic block power supply voltage is less than or equal to the power down detection voltage VDET,
which is 3.0V, typical. To assure that this function operates reliably, a capacitor must be added to the logic block power
supply line so that the logic block power supply voltage V
DD
rise time when the logic block power is first applied and the
logic block power supply voltage V
DD
fall time when the voltage drops are both at least 1 ms.
(See Figure 3 and Figure 4.)
Power Supply Sequence
The following sequences must be observed when power is turned on and off. (See Figure 3 and Figure 4.)
Power on :Logic block power supply(V
DD
) on
→
LCD driver block power supply(V
LCD
) on
Power off:LCD driver block power supply(V
LCD
) off
→
Logic block power supply(V
DD
) off
However, if the logic and LCD driver block use a shared power supply, then the power supplies can be turned on and off
at the same time.
System Reset
The LC75804E/W supports the reset methods described below. When a system reset is applied, display is turned off, key
scanning is stopped, and all the key data is reset to low. When the reset is cleared, display is turned on and key scanning
become possible.
1. Reset methods
(1) Reset at power-on and power-down
If at least 1 ms is assured as the logic block supply voltage V
DD
rise time when logic block power is applied, a system
reset will be applied by the VDET output signal when the logic block supply voltage is brought up. If at least 1 ms is
assured as the logic block supply voltage V
DD
fall time when logic block power drops, a system reset will be applied in
the same manner by the VDET output signal when the supply voltage is lowered. Note that the reset is cleared at the
point when all the serial data (1/3 duty: the display data D1 to D228 and the control data, 1/4 duty: the display data D1 to
D300 and the control data) has been transferred, i.e., on the fall of the CE signal on the transfer of the last direction data,
after all the direction data has been transferred. However, the above operations will be performed regardless of the state
(high or low) of the RES pin. If RES is high, the reset will be cleared at the point the above operations are completed. On
the other hand, if RES is low, the system will remain in the reset period as long as RES is not set high, even if the above
operations are completed. (See Figure 3 and Figure 4.)
No. 6266-23/37
LC75804E, LC75804W
相關(guān)PDF資料
PDF描述
LC75804E 1/3, 1/4 Duty LCD Display Drivers with Key Input Function
LC75804W 1/3, 1/4 Duty LCD Display Drivers with Key Input Function
LC75808 1/8 to 1/10 Duty LCD Display Drivers with Key Input Function
LC75808W 1/8 to 1/10 Duty LCD Display Drivers with Key Input Function
LC75808E 1/8 to 1/10 Duty LCD Display Drivers with Key Input Function
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC75804E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/3, 1/4 Duty LCD Display Drivers with Key Input Function
LC75804E-E 功能描述:LCD 驅(qū)動(dòng)器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
LC75804W 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/3, 1/4 Duty LCD Display Drivers with Key Input Function
LC75804W-E 功能描述:LCD 驅(qū)動(dòng)器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
LC75804WS-E 功能描述:LCD 驅(qū)動(dòng)器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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