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HT16L21 Datasheet(PDF) 11 Page - Holtek Semiconductor Inc

No. de pieza HT16L21
Descripción Electrónicos  RAM Mapping 32x4 LCD Driver
PDF  36 Pages
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Fabricante Electrónico  HOLTEK [Holtek Semiconductor Inc]
Página de inicio  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT16L21 Datasheet(HTML) 11 Page - Holtek Semiconductor Inc

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Rev. 1.00
11
November 16, 2011
HT16L21
Functional Description
Power-On Reset
Whenthepowerisapplied,thedeviceisinitializedbyaninternalpower-onresetcircuit.Thestatusoftheinternal
circuitsafterinitializationisasfollows:
• AllcommonoutputsaresettoVLCD.
• AllsegmentoutputsaresettoVLCD.
• The1/3biasdrivemodeisselected.
• ThesystemoscillatorandtheLCDbiasgeneratorareoffstate.
• LCDdisplayisoffstate.
• Integratedregulatorisdisabled.
• Internalvoltageadjustmentfunctionisenabled.
• Thesegment/LEDsharedpinsaresetasthesegmentpins.
• Framefrequencyissetto64Hz.
• Blinkingfunctionisswitchedoff.
Reset Function
WhentheRSTBpinispulledtoalowlevel,aresetoperationisexecutedanditwillinitializeallfunctions.The
statusoftheinternalcircuitsafterinitializationisasfollows:
• AllcommonoutputsaresettoVLCD.
• AllsegmentoutputsaresettoVLCD.
• The1/3biasdrivemodeisselected.
• ThesystemoscillatorandtheLCDbiasgeneratorareoffstate.
• LCDdisplayisoffstate.
• Integratedregulatorisdisabled.
• Thesegment/LEDsharedpinissetasthesegmentpin.
• Framefrequencyissetto64Hz.
• Blinkingfunctionisswitchedoff.



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