參數(shù)資料
型號(hào)： LC75864E
廠商： Sanyo Electric Co.,Ltd.
英文描述： 1/4 Duty LCD Display Drivers with Key Input Function
中文描述： 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)： 17/26頁(yè)
文件大小： 188K
代理商： LC75864E
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 3.0 V, 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 LC75864E/W supports the reset method 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 method
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 D96 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.)
Figure 3
No. 6860-17/26
LC75864E, 75864W
VDD
t1 t2
t3 t4
VIL
Display and control data transfer
VDET
VDET
VLCD
CE
Internal data
Defined
Undefined
Defined
Undefined
Note:
System reset period
Undefined
Undefined
Internal data (D49 to D96)
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)
D1 to D48
S0, S1, K0, K1
P0 to P2, SC, DR
相關(guān)PDF資料
PDF描述
LC75873NE 1/3 Duty General Purpose LCD Display Driver(1/3占空普通用途LCD顯示驅(qū)動(dòng)器)
LC75874E 1/4-Duty General-Purpose LCD Display Driver(1/4占空通用LCD顯示驅(qū)動(dòng)器)
LC75878W 1/8 to 1/10 Duty General-Purpose LCD Display Drivers
LC75883E 1/3 Duty LCD Display Driver with Key Input Function(1/3占空具有鍵輸入功能的LCD顯示驅(qū)動(dòng)器)
LC75884 1/4 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
LC75864W 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/4 Duty LCD Display Drivers with Key Input Function
LC75873NE 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/3 Duty General-Purpose LCD Display Driver
LC75873NW 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/3 Duty General-Purpose LCD Display Driver
LC75873NWHS-SH-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
LC75874 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/4-Duty General-Purpose LCD Display Driver
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