参数资料
| 型号： | LC75806PT-H |
| 厂商： | ON Semiconductor |
| 文件页数： | 19/35页 |
| 文件大小： | 0K |
| 描述： | IC LCD DISPL DVR KEY-INP 100TQFP |
| 标准包装： | 90 |
| 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页当前第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
LC75806PT
2. Normal mode, when key scan operations are enabled
(1) The KS1 to KS6 pins are set high. (See the description of the control data.)
(2) 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.
(3) If a key is pressed for longer than 615T[s] (Where T=1/fOSC or T=1/fCK), the LC75806PT outputs a key data read
request (a 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.
(4) After the controller reads the key data, the key data read request is cleared (DO is set high) and the LC75806PT
performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1 and
10k Ω ).
Key input 1
Key input 2
Key scan
CE
615T[s]
615T[s]
615T[s]
Serial data transfer
(KSC=0)
Serial data transfer
(KSC=0)
Key
address(43H)
Serial data transfer
(KSC=0)
Key
address
Key
address
DI
DO
Key data read
Key data read Key data read
Key data read request
Key data read request
Key data read request
3. Sleep mode, when key scan operations are enabled
T= f
1
OSC
= f
1
CK
(1) The KS1 to KS6 pins are set to high or low level by the S0 and S1 bits in the control data.
(See the description of the control data.)
(2) If a key on one of the lines corresponding to a KS1 to KS6 pin which is set high is pressed, the oscillator on the OSC
pins starts in RC oscillator operating mode (the IC starts accepting the external clock signal in external clock
operating mode) and a key scan is performed. Keys are scanned until all keys are released.
Multiple key presses are recognized by determining whether multiple key data bits are set.
(3) If a key is pressed for longer than 615T[s] (Where T=1/fOSC or T=1/fCK), the LC75806PT outputs a key data read
request (a 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.
(4) After the controller reads the key data, the key data read request is cleared (DO is set high) and the
LC75806PT performs another key scan. However, this does not clear sleep mode. Also note that DO, being an open-
drain output, requires a pull-up resistor (between 1 and 10k ? ).
(5) Sleep mode key scan example
Example: S0=0, S1=1 (Sleep with only KS6 high)
“L” KS1
“L” KS2
“L” KS3
“L” KS4
“L” KS5
When any one of these keys is pressed, the
oscillator on the OSC pins starts in RC oscillator
operating mode (the IC starts accepting the external
clock signal in external clock operating mode) and a
“H” KS6
*5
key scan operation is performed .
KI1
KI2
KI3
KI4
KI5
Note: * 5. These diodes are required to reliably recognize multiple key presses on the KS6 line when sleep mode state
with only KS6 high, as in the above example. That is, these diodes prevent incorrect operations due to sneak
currents in the KS6 key scan output signal when keys on the KS1 to KS5 lines are pressed at the same time.
No.A1425-19/35
相关PDF资料 |
PDF描述 |
|---|---|
| LC75808W-E | IC LCD DISPLAY DRIVER 100SQFP |
| 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 |
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 |
发布紧急采购，3分钟左右您将得到回复。