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1、串口引腳排列圖RS-232—DB9孔式PinNo.Signal1DCD2TxD3RxD4DSR5GND6DTR7CTS8RTS9---RS-232—DB9針式PinNo.Signal1DCD2RxD3TxD4DTR5GND6DSR7RTS8CTS9---RS-232—DB25孔式PinNo.Signal2RxD3TxD4CTS5RTS6DTR7GND8DCD20DSRRS-232—DB25針式PinNo.Signal2TxD3RxD4RTS5CTS6DSR7GND8DCD20DTRRS-232—RJ45(8pin)PinNo.Signal1DSR2RTS
2、3GND4TxD5RxD6DCD7CTS8DTRRS-232—RJ45(10-pin)PinNo.Signal1DCD2DSR3RTS4GND5TxD6RxD7GND8CTS9DTR10----RS-422—DB25孔式—forOpt8F/ZPinNo.Signal2RxD+(B)3TxD+(B)7GND14RxD-(A)16TxD-(A)RS-422/485—DB25孔式—forOpt8KPinNo.RS-422signalRS-485signal2RxD+(B)Data+3TxD+(B)?7GND?14RxD-(A)Data-16TxD-(A)?PC
3、并行接口引腳定義PC并行接口外觀是25針母插座：?引腳定義PinNameDirDescription1/STROBEStrobe2D0DataBit03D1DataBit14D2DataBit25D3DataBit36D4DataBit47D5DataBit58D6DataBit69D7DataBit710/ACKAcknowledge11BUSYBusy12PEPaperEnd13SELSelect14/AUTOFDAutofeed15/ERRORError16/INITInitialize17/SELINSelectIn18GNDSignalGrou
4、nd19GNDSignalGround20GNDSignalGround21GNDSignalGround22GNDSignalGround23GNDSignalGround24GNDSignalGround25GNDSignalGround?ECP并行口定義ECP是ExtendedCapabilitiesPort的縮寫，外觀同并行口，是25針母插座：?引腳定義PinNameDirDescription1nStrobeStrobe2data0Address,DataorRLEDataBit03data1Address,DataorRLEDataBit14
5、data2Address,DataorRLEDataBit25data3Address,DataorRLEDataBit36data4Address,DataorRLEDataBit47data5Address,DataorRLEDataBit58data6Address,DataorRLEDataBit69data7Address,DataorRLEDataBit710/nAckAcknowledge11BusyBusy12PErrorPaperEnd13SelectSelect14/nAutoFdAutofeed15/nFaultError16/nI
6、nitInitialize17/nSelectInSelectIn18GNDSignalGround19GNDSignalGround20GNDSignalGround21GNDSignalGround22GNDSignalGround23GNDSignalGround24GNDSignalGround25GNDSignalGround以下解釋更具體并串口引腳定義并行口與串行口的區(qū)別是交換信息的方式不同，并行口能同時通過8條數(shù)據(jù)線傳輸信息，一次傳輸一個字節(jié)；而串行口只能用1條線傳輸一位數(shù)據(jù)，每次傳輸一個字節(jié)的一位。并行口由于同時傳輸更多的信息，速度明顯高
7、于串行口，但串行口可以用于比并行口更遠(yuǎn)距離的數(shù)據(jù)傳輸。25針并行口插口的針腳功能： ?針腳?功能?針腳?功能 1?選通?(STROBE低電平)??????10?確認(rèn)?(ACKNLG低電平) 2?數(shù)據(jù)位0?(DATAO)??????????11?忙?(BUSY) 3?數(shù)據(jù)位1?(DATA1)??????????12?卻紙?(PE) 4?數(shù)據(jù)位2?(DATA2)??????????13?選擇?(SLCT) 5?數(shù)據(jù)位3?(DATA3)??????????14?自動換行?(AUTOFEED低電平) 6?數(shù)據(jù)位4?(DATA4)?????????
8、?15?錯誤觀點(ERROR低電平) 7?數(shù)據(jù)位5?(DATA5)??????
