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參數(shù)資料
| 型號： | ML9090-01 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | LCD Driver with Key Scanner and RAM(帶鍵掃描和RAM的LCD驅(qū)動器) |
| 中文描述： | LCD驅(qū)動器與關(guān)鍵掃描儀和內(nèi)存（帶鍵掃描和內(nèi)存的液晶驅(qū)動器） |
| 文件頁數(shù)： | 28/35頁 |
| 文件大?。?/td> | 302K |
| 代理商： | ML9090-01 |
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Semiconductor
ML9090-01,-02
28/35
Key Scan
Key scan operation begins after a key switch turns ON. Key scan operation is halted after all key
switches are detected as OFF. Two cycles after key scan operation starts, the KREQ signal
changes from an “L” to “H” level. This signal can be used as a flag. The KREQ signal is reset when
all key switches have been detected as OFF and an “L” level is input to the
RESET
pin.
R0
KREQ
Key switch ON
Start scan
R1
R2
R3
R4
Start reading
key data
Key switch OFF
Halt scan
Note 1:
Pressing three or more key switches simultaneously may result in incorrect recognition
(a switch that was not pressed may be recognized as a switch that was pressed).
Therefore, if it is necessary to recognize three or more pressed switches, connect a diode
in series with each switch. If three or more pressed switches are not to be recognized,
data should be ignored if there are three or more “1s” in the key data that is read by
software.
Note 2 : Because changes in the key status are detected as changes in the column inputs (
C0
to
C4
), changes will not be detected if multiple switches connected to the same column
are pressed.
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| ML9092-02 | LCD Driver with Key Scanner and RAM |
| ML9092-03 | LCD Driver with Key Scanner and RAM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML9090-01- | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:LCD Driver with Key Scanner and RAM |
| ML9090-02 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:LCD Driver with Key Scanner and RAM |
| ML9090A | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:LCD Driver with Key Scanner and RAM |
| ML9090A-01GA | 制造商:ROHM Semiconductor 功能描述: |
| ML9090A-01GAZ03A | 制造商:ROHM Semiconductor 功能描述: |
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