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參數(shù)資料
| 型號(hào)： | LC75700T-MPB-E |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC KEY SCANNING LSI 20TSSOP |
| 標(biāo)準(zhǔn)包裝： | 70 |
| 系列： | * |
3. Output pin states during a reset
Sample Application Circuit
*4. Since this output pin is an open-drain output, a pull-up resistor of between 1 and 10 k
is required. This pin remains high during the reset period even if a
key data read operation is performed.
No. 7632-13/16
LC75700T
Output pins
State during a reset
KS1 to KS3
L
KS4/P4 to KS6/P2
L
P1
L
DO
H *4
To the controller
power supply
To the controller
From the controller
+5 V
VDD
KS4/P4
KI5
KS6/P2
(P1)
(P2)
(P3)
(P4)
P1
OSC
*5.
*6.
*7.
When the power is first applied, it must be initialized by RES = "L".
The DO pin,being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 and 10 k
) appropriate
for the capacitance of the external wiring so that signal waveforms are not degraded.
Each of The KS4/P4 to KS6/P2 pins must be set to either the key scan output port or the general-purpose output port.
DO
DI
CL
*6
Key matrix
(up to 30 keys)
CE
VSS
KS5/P3
KS3
KS2
KS1
KI4
KI3
KI2
KI1
Used with the backlight
controller or other circuit.
(General-purpose output ports)
RES *5
*7
Note:
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