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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT9B95 датащи(PDF) 15 Page - Holtek Semiconductor Inc |
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HT9B95 датащи(HTML) 15 Page - Holtek Semiconductor Inc |
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15 / 32 page  Rev. 1.10 15 November 25, 2015 HT9B95A/B/G I2C Interface Write Operation Write Operation AWriteoperationrequiresaSTARTcondition,a slaveaddressbytewithaR/Wbit,acommandbyte,a commandbyteordisplayRAMdatabyteandaSTOP condition. TheMSBofthecommandbyteisdefinedas“C”bit, theCbitisthecommand/dataselectionbit.Whenthe Cbitissetto“1”,thenextbyteisacommandbyte. WhentheCbitissetto“0”,thenextbyteisdisplay RAMdata.Thedatatransferformatisshowninthe accompanyingdiagram. OnceitentersdisplayRAMdatawritemode,itcan notbewrittenanycommand.Towriteacommand byte,itisnecessarytogenerateaSTARTcondition again. • Single Command Type ASingleCommandwriteoperationrequiresa STARTcondition,aslaveaddresswithaR/Wbit, acommandbyteandaSTOPconditionforasingle commandwriteoperation. Slave Address ACK Command byte ACK S 0 1 1 1 1 1 0 0 1st Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 1 P W R/ C bit I2C Single Command Type Write Operation • Compound Command Type ACompoundCommandwriteoperationrequiresa STARTcondition,aslaveaddresswithaR/Wbit followedbymultiplecommandbytesandfinallya STOPconditionforacompoundcommandwrite operation. • Display RAM Single Data Byte AdisplayRAMdatabytewriteoperationrequires aSTARTcondition,aslaveaddresswithaR/Wbit, avalidRegisterAddressbyte,aDatabyteanda STOPcondition. Thestartaddresscanonlybesetfrom00Hto themaximumavailableaddress,22H,15Hor 26H,dependinguponwhichdeviceisusedwith differentdutyconfigurations.Itisrecommended thatthestartaddressshouldnotbegreaterthanthe maximumavailableaddress. Slave Address ACK Command byte ACK S 0 1 1 1 1 1 0 0 Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 C W R/ Command byte ACK Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 C P C bit ="1", the next byte is command I2C Command Type Write Operation Slave Address ACK RAM Address byte ACK S 0 1 1 1 1 1 0 0 Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 C W R/ RAM Data byte ACK Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 P C bit ="0", the next byte is display RAM data I2C Display RAM Data Write Operation ACK Command byte P 1 nth Command Command byte 1 1st Command ACK Slave Address 0 1 1 1 1 1 0 0 ACK Bit0 Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 S C bit C bit W R/ Command byte 1 2nd Command ACK Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 C bit I2C Compound Command Type Write Operation Slave Address ACK S 0 1 1 1 1 1 0 0 RAM Data byte ACK P D7 D6 D5 D4 D3 D2 D1 D0 RAM Address byte ACK A0 A1 A2 A3 A4 0 0 W R/ A5 C bit I2C Display RAM Single Data Byte Write Operation |
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