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參數資料
| 型號： | LC75893M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/3 Duty LCD Display Driver with Key Input Function |
| 中文描述： | 1 / 3職務液晶顯示驅動器與關鍵輸入功能 |
| 文件頁數： | 11/23頁 |
| 文件大?。?/td> | 389K |
| 代理商： | LC75893M |
Key Scan Operation Functions
1. Key scan timing
The key scan period is 192 T (s). To reliably determine the on/off state of the keys, the LC75893M scans the keys
twice and determines that a key has been pressed when the key data agrees. It outputs a key data read request (a low
level on DO) 420 T (s) after starting a key scan. If the key data does not agree and a key was pressed at that point, it
scans the keys again. Thus the LC75893M cannot detect a key press shorter than 420 T (s).
Note:
*
3. In sleep mode the high/low state of these pins is determined by the S0 and S1 bits in the control data. Key scan output signals are not output
from pins that are set low.
2. In normal mode
The pins KS1 to KS4 are set high.
When a key is pressed a key scan is started and the keys are scanned until all keys are released. Multiple key
presses are recognized by determining whether multiple key data bits are set.
If a key is pressed for longer than 420 T (s) (where T =
) the LC75893M output a key data read
request (a low level on DO) to the controller. The controller acknowledges this request and reads the key data.
However, if CE is high during a serial data transfer, DO will be set high.
After the controller reads the key data, the key data read request is cleared (DO is set high) and the LC75893M
performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1
and 10 k
).
1
f
OSC
No. 5971-11/23
LC75893M
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LC75893M-TLM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LC75897PW | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/3, 1/4-Duty General-Purpose LCD Display Driver |
| LC75897PW-E | 功能描述:LCD 驅動器 LCD DISPLAY DRIVER RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量: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 |
| LC75897PWS-T-E | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays 制造商:ON Semiconductor 功能描述:ON Semiconductor LC75897PWS-T-E Interface Misc 制造商:ON Semiconductor 功能描述:FTRAY / LCD DISPLAY DRIVER |
| LC75A | 制造商:Microsemi Corporation 功能描述:TVS SGL UNI-DIR 75V 1.5KW 2PIN DO-13 - Bulk 制造商:Microsemi Corporation 功能描述:TVS DIODE 75VWM 121VC DO202AA |
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