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參數(shù)資料
| 型號： | 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)動器，主要輸入功能 |
| 文件頁數(shù)： | 24/26頁 |
| 文件大?。?/td> | 188K |
| 代理商： | LC75864E |
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No. 6860-24/26
LC75864E, 75864W
Notes on the controller key data read techniques
1. Timer based key data acquisition
(1) Flowchart
Key data read
processing
(2) Timing chart
t5: Key scan execution time when the key data agreed for two key scans. (800 T (s))
t6: Key scan execution time when the key data did not agree for two key scans and the key scan was executed again. (1600 T (s))
1
f
OSC
T =
t7: Key address (43H) transfer time
t8: Key data read time
(3) Explanation
In this technique, the controller uses a timer to determine key on/off states and read the key data. The controller
must check the DO state when CE is low every t9 period without fail. If DO is low, the controller recognizes that a
key has been pressed and executes the key data read operation.
The period t9 in this technique must satisfy the following condition.
t9 > t6 + t7 + t8
If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge
data (SA) will be invalid.
Key input
Key data read
Key data read request
Key
address
Key on
t5
t5
t5
t6
t8
t8
t8
t7
t9
Controller determination
(Key on)
Controller determination
(Key on)
Controller determination
(Key off)
Controller determination
(Key on)
Controller determination
(Key off)
t9
t9
t9
t7
t7
Key on
Key scan
CE
DI
DO
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)動器) |
| LC75874E | 1/4-Duty General-Purpose LCD Display Driver(1/4占空通用LCD顯示驅(qū)動器) |
| 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 |
| 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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