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參數(shù)資料
| 型號： | LC75838E |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/3 Duty LCD Display Drivers with Key Input Function |
| 中文描述： | 1 / 3職務(wù)液晶顯示驅(qū)動(dòng)器與關(guān)鍵輸入功能 |
| 文件頁數(shù)： | 12/24頁 |
| 文件大?。?/td> | 230K |
| 代理商： | LC75838E |
2. In normal mode
The pins KS1 to KS6 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 615T(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 LC75863E/W
performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1
and 10 k
).
No. 7135-12/24
LC75863E, 75863W
Key on
576T[s]
*
3
*
3
*
3
*
3
*
3
*
3
*
3
*
3
*
3
1
1
2
2
3
3
4
4
5
5
6
6
KS4
KS5
KS6
KS3
KS2
*
3
KS1
T=
1
fosc
Key data read request
Key data read request
Key data read request
Key data read
Key data read
Key data read
DO
DI
Key address
(43H)
Key address
Key address
Serial data
transfer
Serial data
transfer
Serial data
transfer
CE
615T[s]
615T[s]
615T[s]
Key scan
Key input 2
Key input 1
T=
1
fosc
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.
Key Scan Operation Functions
1. Key scan timing
The key scan period is 288T(s). To reliably determine the on/off state of the keys, the LC75863E/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) 615T(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 LC75863E/W cannot detect a key press shorter than 615T(s).
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PDF描述 |
|---|---|
| LC7583N | LCD Driver with Level Meter |
| LC75842 | General-Purpose 1/2 Duty LCD Display Driver |
| LC75844 | 1/4 Duty General-Purpose LCD Driver |
| LC7584 | 1/4 Duty General-Purpose LCD Driver |
| LC75842E | General-Purpose 1/2 Duty LCD Display Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC75838W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/8 to 1/10 Duty General-Purpose LCD Display Drivers |
| LC75838W-E | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays |
| LC75838WS-E | 功能描述:LCD 驅(qū)動(dòng)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(shí)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 |
| LC75839PW | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1/4 and 1/3-Duty General-Purpose LCD Display Driver |
| LC75839PW-H | 功能描述:LCD 驅(qū)動(dòng)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(shí)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 |
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