参数资料
| 型号： | LC75808W-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 37/38页 |
| 文件大小： | 0K |
| 描述： | IC LCD DISPLAY DRIVER 100SQFP |
| 标准包装： | 60 |
| 系列： | * |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页当前第37页第38页
LC75808W
2. Interrupt based key data acquisition
? Flowchart
CE=[L]
DO=[L]
YES
Key data
read processing
Wait for at least t10
CE=[L]
NO
? Timing chart
Key input
Key scan
Key on
NO
DO=[H]
YES
Key OFF
A12930
Key on
t5
t5
t6
t5
CE
t8
t8
t8
t8
Key
DI
addres s
t7
Key data read
t7
t7
t7
DO
Key data read request
t10
t10
t10
t10
Controller
detemination
(Key on)
Controller
detemination
(Key off)
Controller
detemination
(Key on)
Controller
detemination
(Key on)
Controller
detemination
(Key on)
Controller
detemination
(Key off)
A12931
t5: Key scan execution time when the key data agreed for two key scans. (800T(S))
t6: Key scan execution time when the key data did not agree for two key scans and
the key scan was executed again. (1600T(S))
t7: Key address (43H) transfer time
t8: Key data read time
T=
1
fOSC
? 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 t10 has
elapsed by checking the DO state when CE is low and reading the key data. The period t10 in this technique must
satisfy the following condition.
t10 > t6
If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge
data (SA) will be invalid.
No.6370-37/38
相关PDF资料 |
PDF描述 |
|---|---|
| LC75812PT-8565-H | IC LCD DISPLAY DRIVER 100TQFP |
| LC75813E-E | IC LCD DISPLAY DRIVER 100QLP |
| LC75832W-E | IC LCD DISPLAY DRIVER 64SQFP |
| LC75841PE-H | IC LCD DISPLAY DRIVER 36QFP |
| LC75844M-E | IC LCD DISPLAY DRIVER MFP36SDJ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LC75808WS-E | 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 |
| LC75808W-SH-E | 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 |
| 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 |
| LC75809PTS-H | 制造商:ON Semiconductor 功能描述:LCD DISPLAY DRIVER - Trays |
发布紧急采购，3分钟左右您将得到回复。