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參數(shù)資料
| 型號： | LC75741 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/2 Duty Driver for Frequency Displays |
| 中文描述： | 1 / 2的責任驅(qū)動頻率顯示 |
| 文件頁數(shù)： | 17/18頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LC75741 |
When the controller uses interrupt processing to read out the key data
Flowchart
Timing chart
t5.........Key scan execution time (25600T [s]) when the key data for two key scan operations matches.
t6 ........Key scan execution time (51200T [s]) when the key data for the first two key scan operations
............
does not match.
t7......... Key address (8F
H
) transfer time
t8.........Key data readout time
Operation
When the controller uses interrupt processing for key on/off determination and key data readout, it must check the state
of DO when CE is low, and perform a key data readout if DO is low. The next time the controller checks the on/off
states of the keys, it must make that determination at a time t10 after the last readout based on the state of DO when
CE is low, and then read out the key data. The time t10 must obey the following inequality:
t10 > t6
Note that if the controller reads out key data when DO is high, both the key data (KD1 to KD30) and the sleep
acknowledge data will be invalid data.
No. 6142-17/18
LC75742E, LC75742W
T =
1
[s]
f
OSC
Wait period
(at least t10)
Controller
determination
(Key on)
Controller
determination
(Key off)
Controller
determination
(Key on)
Controller
determination
(Key on)
Controller
determination
(Key on)
Controller
determination
(Key off)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC75741E | 1/2 Duty Driver for Frequency Displays |
| LC75742E | RES 36K OHM 1/8W 5% 0805 SMD |
| LC75742W | 1/2 Duty VFD Driver with Key Input Function |
| LC75750W | 1/3 Duty VFD Driver(1/3占空VFD顯示驅(qū)動器) |
| LC75754M | 1/3 Duty VFD Driver(1/3占空VFD顯示驅(qū)動器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC75741E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/2 Duty Driver for Frequency Displays |
| LC75741W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/2 Duty Driver for Frequency Displays |
| LC75742E | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/2 Duty VFD Driver with Key Input Function |
| LC75742W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/2 Duty VFD Driver with Key Input Function |
| LC7574E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Vacuum Fluorescent Display Driver |
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