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1、PCI 总线接口定义图为 32 位总线，且可扩展为 64 位，有 124 个脚（实际上去掉 4 个定位卡有 120引脚）,AD线有32条，工作频率为33MHZ/66MHZ，最大传输速率133MB/S。 总线宽度32位（5V） 64位3.3V。PCI总线（32位）底视图名称信号名称信号名称PinSide A1RSide A2RSide B1RSide B2R1TRST#352+12V535-12VOOTCK02TMSooTD1350Ground0TDOOO3+5V352INTA#526+5V351+5V3504INTC#528+5V350INTB#526INTD #5265Reserved543
2、+5V351PRSNT1 #OOReservedOO6ReservedOOGround0PRSNT2 #ooGround07Ground0ReservedOOGround0ReservedOO8Reset#477+5V351Ground0CLK7349GNT#500Ground0Ground0REQ #47310Reserved1955AD(30)477+5V350AD(31)47711+3.3VOOAD(28)477AD(29)477Ground012AD(26)477Ground0AD(27477AD(25)47713AD(24)476IDSEL593+3.3VOOC/BE #(3)486
3、14+3.3VOOAD(22)477AD(23)477Ground015AD(20)477Ground0AD(21)477AD(19)47716AD(18)460AD(16)477+3.3VOOAD(17)47717+3.3VOOFRAME#477C/BE #(2)484Ground018Ground0TRDY #477ITRDY #477TRDY #OO19Ground0STOP #477DEVSEL #484Ground020+3.3VOOSDONE1669LOCK #497PERR #166621SBO #1667Ground0+3.3VOOSERR #47222PAR476AD(15)
4、477+3.3VooC/BE #(1)48523+3.3VOOAD(13)477AD(14)477Ground024AD(11)477Ground0AD(12)477AD(10)47725AD(09)477定位卡Ground0定位卡26定位卡C/BE #(0)485定位卡AD(08)47727+3.3VOOAD(06)477AD(07)477+3.3VOO28AD(04)477Ground0AD(O5)477AD(03)47729AD(02)477AD(00)477Ground0AD(01)47730+5V350REQ 64#1880+5V350ACK 64#OO31+5V351+5V352+
5、5V350+5V350注：1、“ #”表低电平有效。2、Reserved为保留线。3、Ground为地。4、AD线为数据地址复合线。Pin+5V+33VUniversalDescriptionAlTRSTTest Logic ResetA2+12V+12 VDCA3TMSTest Mde SelectA4TDITest Data InputA5+5V+5 VDCA6INTAInterrupt AA7INTCInterrupt CA8+5V+5 VDCA9RESV01Reserved VDCA10+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)AllRESV0
6、3Reserved VDCA12GND03(OPEN)(OPEN)Ground or Open (Key)A13GND05(OPEN)(OPEN)Ground or Open (Key)A14RESV05Reserved VDCA15RESETResetA16+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)A17GNTGrant PCI useA18GND08GroundA19RESV06Reserved VDCA20AD30Address/Data 30A21+3.3V01+3.3 VDCA22AD28Address/Data 28A23AD26Addre
7、ss/Data 26A24GND10GroundA25AD24Address/Data 24A26IDSELInitialization Device SelectA27+3.3V03+3.3 VDCA28AD22Address/Data 22A29AD20Address/Data 20A30GND12GroundA31AD18Address/Data 18A32AD16Address/Data 16A33+3.3V05+3.3 VDCA34FRAMEAddress or Data phaseA35GND14GroundA36TRDYTarget ReadyA37GND15GroundA38S
8、TOPStop Transfer CycleA39+3.3V07+3.3 VDCA40SDONESnoop DoneA41SBOSnoop BackoffA42GND17GroundA43PARParityA44AD15Address/Data 15A45+3.3V10+3.3 VDCA46AD13Address/Data 13A47AD11Address/Data 11A48GND19GroundA49AD9Address/Data 9A52C/BE0Command, Byte Enable 0A53+3.3V11+3.3 VDCA54AD6Address/Data 6A55AD4Addre
9、ss/Data 4A56GND21GroundA57AD2Address/Data 2A58AD0Address/Data 0A59+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)A60REQ64Request 64 bit ?A61VCC11+5 VDCA62VCC13+5 VDCA63GNDGroundA64C/BE7#Command, Byte Enable 7A65C/BE5#Command, Byte Enable 5A66+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)A67PAR64Parity 64 ?A6
10、8AD62Address/Data 62A69GNDGroundA70AD60Address/Data 60A71AD58Address/Data 58A72GNDGroundA73AD56Address/Data 56A74AD54Address/Data 54A75+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)A76AD52Address/Data 52A77AD50Address/Data 50A78GNDGroundA79AD48Address/Data 48A80AD46Address/Data 46A81GNDGroundA82AD44Addr
11、ess/Data 44A83AD42Address/Data 42A84+5V+3.3VSignal Rail+V I/O (+5 V or +3.3 V)A85AD40Address/Data 40A86AD38Address/Data 38A87GNDGroundA88AD36Address/Data 36A89AD34Address/Data 34A90GNDGroundA91AD32Address/Data 32A92RESReservedA93GNDGroundA94RESReservedB1-12V-12 VDCB2TCKTest ClockB3GNDGroundB4TDOTest Data OutputB5+5V+5 VDCB6+5V+5 VDCB7INTBInterrupt BB8INTDInterr
