ST8009 데이터 시트보기 (PDF) - Sitronix Technology Co., Ltd.
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ST8009 Datasheet PDF : 43 Pages
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ST8009
9. PRECAUTIONS
Precautions when connecting or disconnecting
the power supply
This IC has a high-voltage LCD driver, so a high
current that may flow if voltage is supplied to the LCD
drive power supply while the logic system power
supply is floating may permanently damage it. The
details are as follows,
When connecting the power supply, connect the LCD
drive power after connecting the logic system power.
Furthermore, when disconnecting the power,
disconnect the logic system power after disconnecting
the LCD drive power
And when connecting the logic power supply, the logic
condition of this IC inside is insecure. Therefore
connect the LCD drive power supply after resetting
logic condition of this IC inside on XDISPOFF function.
After that, cancel the XDISPOFF function after the
LCD drive power supply has become stable.
Furthermore, when disconnecting the power, set the
LCD drive output pins to level VSS on XDISPOFF
function. Then disconnect the logic system power after
disconnecting the LCD drive power.
When connecting the power supply, follow the
recommended sequence shown here
VDD
VDD
VSS
VDD
XDISPOFF
VSS
V0
V0
VSS
V1.1
20/43
2006/11/1
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