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參數(shù)資料
| 型號： | LC75808W |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/8 to 1/10 Duty LCD Display Drivers with Key Input Function |
| 中文描述： | 1月8日至1月10日當值液晶顯示驅(qū)動器與關(guān)鍵輸入功能 |
| 文件頁數(shù)： | 23/39頁 |
| 文件大?。?/td> | 981K |
| 代理商： | LC75808W |
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No. 6370 -23/39
LC75808E, 75808W
2. In normal mode
The pins KS1 to KS6 are set to high or low by the KC1 to KC6 bits in the control data.
If a key on one of the lines corresponding to a KS1 to KS6 pin which is set high 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 800T(s) (Where T= fosc
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 LC75808E/W
performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between
1 k
and 10 k
).
Note:
*3.
Note that the high/low states of these pins are determined by the KC1 to KC6 bits in the control data, and that key scan output signals are not
output from pins that are set to low.
Key Scan Operation Functions
1. Key scan timing
The key scan period is 384T(s). To reliably determine the on/off state of the keys, the LC75808E/W 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) 800T(s) after starting a key scan. If the key data dose not agree and a key was pressed at that point, it
scans the keys again. Thus the LC75808E/W cannot detect a key press shorter than 800T(s).
*3
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PDF描述 |
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| LC75814V | 1/4 Duty General-Purpose LCD Driver |
| LC75816E | 1/8 to 1/10 Duty Dot Matrix LCD Display Controllers/Drivers with Key Input Function |
| LC75817 | 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC75808W-E | 功能描述:LCD 驅(qū)動器 LCD DISPLAY DRIVER 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 |
| LC75808WS-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 |
| LC75808W-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 |
| LC75809PT-H | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays |
| LC75809PTH-H | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays |
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