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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)： | 16/18頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LC75741 |
Notes on Controller Transfer of Display Data
Since the display data (D1 to D82) is transferred in two operations as shown in figure 2, we strongly recommend that
applications transfer all the data within a 30 ms period to assure display quality.
Controller Key Data Readout Procedure
When the controller uses a timer 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 use timer processing for key on/off determination and key data readout, it must set CE low and
check the state of DO at least once every t9 period. If DO is low, the controller must recognize that a key has been
pressed and read out the key data.
The period t9 must obey the following inequality:
t9 > t7 + t8 + 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. 6142-16/18
LC75742E, LC75742W
T =
1
[s]
f
OSC
Controller
determination
(Key on)
Controller
determination
(Key on)
Controller
determination
(Key off)
Controller
determination
(Key on)
Controller
determination
(Key off)
相關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) |
相關代理商/技術參數(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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