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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT69F360 데이터시트(PDF) 199 Page - Holtek Semiconductor Inc |
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HT69F360 데이터시트(HTML) 199 Page - Holtek Semiconductor Inc |
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199 / 235 page  Rev. 1.30 19� �ove��e� 1�� �01� Rev. 1.30 199 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM C Type Biasing ForCtypebiasinganexternalpinorinternalpowersourceisselectedviaLCDP1~LCDP0bitin LCDC1register.TheLCDvoltagesourceissuppliedonpinVLCD,V1,V2orinternalpowerto generatetheinternalbiasingvoltages. WhenpowersourceisfrompinVLCD,theCtypebiasingschemeusesaninternalchargepump circuit,whichinthecaseofthe1/3biasselectioncangeneratevoltageshigherthanwhatissupplied onVLCD.Thisfeatureisusefulinapplicationswherethemicrocontrollersupplyvoltageisless thanthesupplyvoltagerequiredbytheLCD.Anadditionalchargepumpcapacitormustalsobe connectedbetweenpinsC1andC2togeneratethenecessaryvoltagelevels. Thedevicehasabuilt-indepletioncircuitforLCDvoltagesource.ThiscouldbetheDPNVref (~1.08V)orinternalpower(VDD)togeneratebiasingvoltagewhenLCDPbitbeconfigured01,10 or11. FortheCtype1/3biasselection,fourvoltagelevelsVSS,VA,VBandVCareutilised.Whenpower sourceisfrompinV1orVDD,whichismaximumbias.ThepinVLCDmustconnecta0.1ufto ground.AndchargepumpwillgenerateVBandVC,VBwillhaveavalueequaltoVA×2/3andVC willhaveavalueequaltoVA×1/3. WhenpowersourceisfrompinVLCDorVDD,ThevoltageVAisgeneratedinternallyandhasa valueofVLCD×1.5.VBwillhaveavalueequaltoVA×2/3andVCwillhaveavalueequaltoVA×1/3. WhenpowersourceisfrompinV2orDPNVref,ThevoltageVAisgeneratedinternallyandhasavalue ofVC×3.VBwillhaveavalueequaltoVC×2andVCwillhaveavalueequaltoV2orDPNVref. Cha�ge Pu�p VA=V1=3Vi VB=VLCD=�Vi VC=V�=Vi 0.1uF 0.1uF 0.1uF C1 C� V1 V� VMAX VLCD Powe� Supply f�o� pin V� Vi Cha�ge Pu�p VA=V1=3/�*VDD VB=VLCD=VDD VC=V�=1/�*VDD 0.1uF 0.1uF 0.1uF C1 C� V1 V� VMAX VLCD VDD Powe� Supply f�o� pin VLCD VA=3×Vi VB=�×Vi VC=1×Vi 0.1uF 0.1uF 0.1uF C1 C� V1 V� VMAX VLCD VDD Powe� Supply f�o� inte�nal powe� VDD VDD Cha�ge Pu�p DP� V�ef Vi Cha�ge Pu�p VA=V1=VDD VB=VLCD=�/3*VDD VC=V�=1/3*VDD 0.1uF 0.1uF 0.1uF C1 C� V1 V� VMAX VLCD VDD Powe� Supply f�o� pin V1 LCD power source from external pin LCD power source from internal power 0.1uF Note:ThepinVMAXmustconnecttomaximumvoltagetopreventpadleakage. C Type Bias Voltage Levels |
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