参数资料
| 型号： | LC75806PT-H |
| 厂商： | ON Semiconductor |
| 文件页数： | 30/35页 |
| 文件大小： | 0K |
| 描述： | IC LCD DISPL DVR KEY-INP 100TQFP |
| 标准包装： | 90 |
| 系列： | * |
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LC75806PT
2. Interrupt based key data acquistion
(1) Flowchart
CE=”L”
NO
DO=”L”
YES
Key data read
processing
Wait for
at least t8
CE=”L”
NO
DO=”H”
YES
Key OFF
(2) Timing chart
Key input
Key scan
Key on
Key on
t3
t3
t4
t3
CE
DI
t5
t6
Key
address
Key data read
t5
t6
t5
t6
t5
t6
DO
Key data read request
t8
t8
t8
t8
Controller
determination
(Key on)
Controller
determination
(Key off)
Controller
determination
(Key on)
Controller
determination
(Key on)
Controller
determination
(Key on)
Controller
determination
(Key off)
t3 ······· Key scan execution time when the key data agreed for two key scans. (615T[s])
t4 ······· Key scan execution time when the key data did not agree for two key scans and the key scan was executed
again. (1230T[s])
t5 ······· Key address (43H) transfer time
t6 ········ Key data read time
T= f
1
OSC
=
1
fCK
(3) Explanation
In this technique, the controller uses interrupts to determine key on/off states and read the key data.
The controller must check the DO state when CE is low. If DO is low, the controller recognizes that a key has been
pressed and executes the key data read operation. After that the next key on/off determination is performed after the
time t8 has elapsed by checking the DO state when CE is low and reading the key data. The period t8 in this
technique must satisfy the following condition.
t8>t4
If a key data read operation is executed when DO is high (DO does not generate a key data read request output), the
read key data (KD1 to KD30) and sleep acknowledge data (SA) will be invalid.
No.A1425-30/35
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC75806PTS-H | 功能描述:LCD 驱动器 RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| LC75806PTS-T-H | 功能描述:LCD 驱动器 RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| LC75808 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1/8 to 1/10 Duty LCD Display Drivers with Key Input Function |
| LC75808E | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1/8 to 1/10 Duty LCD Display Drivers with Key Input Function |
| LC75808W | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1/8 to 1/10 Duty LCD Display Drivers with Key Input Function |
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