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參數(shù)資料
| 型號： | LC75838E |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/3 Duty LCD Display Drivers with Key Input Function |
| 中文描述： | 1 / 3職務液晶顯示驅動器與關鍵輸入功能 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 230K |
| 代理商： | LC75838E |
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.)
Power Supply Sequence
The following sequences must be observed when power is turned on and off. (See Figure 3.)
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 LC75863E/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
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 (the display data D1 to D75 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 (see Figure 3).
No. 7135-16/24
LC75863E, 75863W
Display and control data transfer
D1 to D39
S0, S1, K0, K1
P0 to P2, SC, DR
Internal data
Internal data
(D40 to D75)
VDD
CE
VLCD
Undefined
Undefined
Undefined
Undefined
System reset period
Defined
Defined
VIL
t3
t2
t4
t1
VDET
VDET
Note: t1
≥
1 [ms] (Logic block power supply voltage V
DD
rise time)
t2
≥
0
t3
≥
0
t4
≥
1 [ms] (Logic block power supply voltage V
DD
fall time)
Figure 3
相關PDF資料 |
PDF描述 |
|---|---|
| LC7583N | LCD Driver with Level Meter |
| LC75842 | General-Purpose 1/2 Duty LCD Display Driver |
| LC75844 | 1/4 Duty General-Purpose LCD Driver |
| LC7584 | 1/4 Duty General-Purpose LCD Driver |
| LC75842E | General-Purpose 1/2 Duty LCD Display Driver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LC75838W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/8 to 1/10 Duty General-Purpose LCD Display Drivers |
| LC75838W-E | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays |
| LC75838WS-E | 功能描述:LCD 驅動器 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 |
| LC75839PW | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/4 and 1/3-Duty General-Purpose LCD Display Driver |
| LC75839PW-H | 功能描述:LCD 驅動器 LCD DISPLAY DRIVER RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率: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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