参数资料
| 型号： | LC75808W-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 36/38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页当前第36页第37页第38页
LC75808W
Notes on the Controller Key Data Read Techniques
1. Timer based key data acquisition
? Flowchart
CE=[L]
DO=[L]
NO
YES
Key data
read processing
A12928
? Timing chart
Key input
Key scan
Key on
Key on
t5
t6
t5
t5
CE
DI
DO
t8
Key
address
t7
Key data read
Key data read request
t7
t8
t7
t8
t9
t9
t9
t9
Controller
detemination
(Key on)
Controller
detemination
(Key on)
Controller
detemination
(Key off)
Controller
detemination
(Key on)
Controller
detemination
(Key off)
A12929
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 a timer to determine key on/off states and read the key data. The controller must
check the DO state when CE is low every t9 period without fail. If DO is low, the controller recognizes that a key has
been pressed and executes the key data read operation.
The period t9 in this technique must satisfy the following condition.
t9 > t6 + t7 + t8
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.6370-36/38
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。