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1、PCI總線接口定義圖為32位總線，且可擴(kuò)展為64位，有124個(gè)腳（實(shí)際上去掉 4個(gè)定位卡有120引腳），AD線有32條，工作頻率為33MHZ/66MHZ，最大傳輸速率 133MB/S。總線寬度 32位（5V） 64位3.3V。PCI總線（32位）底視圖名稱信號(hào)名稱信號(hào)名稱PinSide A1RSide A2RSide B1RSide B2R1TRST#352+12V535-12VOOTCK02TMSooTD1350Ground0TDOOO3+5V352INTA#526+5V351+5V3504INTC#528+5V350INTB#526INTD #5265Reserve d543+5V351P

2、RSNT1 #OOReservedOO6Reserve dOOGround0PRSNT2#ooGround07Ground0Reserve dOOGround0Reservedoo8Reset#477+5V351Ground0CLK7349GNT#500Ground0Ground0REQ #47310Reserve d1955AD(30)477+5V350AD(31)47711+3.3VOOAD(28)477AD(29)477Ground012AD(26)477Ground0AD(27477AD(25)47713AD(24)476IDSEL593+3.3VOOC/BE #(3)48614+3.

3、3VOOAD(22)477AD(23)477Ground015AD(20)477Ground0AD(21)477AD(19)47716AD(18)460AD(佝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)477+3.3Vo

4、oC/BE #(1)48523 1+3.3V :OO:AD(13)477P AD(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+5V

5、350+5V350注：1、牛表低電平有效。2、 Reserved為保留線。3、 Ground為地。4、AD線為數(shù)據(jù)地址復(fù)合線Pin+5V+3.3VUniversalDescriptionA1TRSTTest 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 什5 V or +3.3 V)A11RESV03Res

6、erved VDCA12GND03(OPEN)(OPEN)Ground or Open (Key)A13GND05(OPEN)(OPEN)Ground or Open (Key)A14RESV05Reserved VDCA15RESETResetA16+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)A17GNTGrant PCI useA18GND08GroundA19RESV06Reserved VDCA20AD30Address/Data 30A21+3.3V01+3.3 VDCA22AD28Address/Data 28A23AD26Address/Da

7、ta 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 ReadyA37GND15GroundA38STOPSt

8、op 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 6A55AD4Address/Da

9、ta 4A56GND21GroundA57AD2Address/Data 2A58AD0Address/Data 0A59+5V+3.3VSignal Rail+V I/O 什5 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 什5 V or +3.3 V)A67PAR64Parity 64 ?A68AD62Ad

10、dress/Data 62A69GNDGroundA70AD60Address/Data 60A71AD58Address/Data 58A72GNDGroundA73AD56Address/Data 56A74AD54Address/Data 54A75+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)A76AD52Address/Data 52A77AD50Address/Data 50A78GNDGroundA79AD48Address/Data 48A80AD46Address/Data 46A81GNDGroundA82AD44Address/Data

11、 44A83AD42Address/Data 42A84+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)A85AD40Address/Data 40A86AD38Address/Data 38A87GNDGroundA88AD36Address/Data 36A89AD34Address/Data 34A90GNDGroundA91AD32Address/Data 32A92RESReservedA93GNDGroundA94RESReservedB1-12V-12 VDCB2TCKTest ClockB3GNDGroundB4TDOTest Data Out

12、putB5+5V+5 VDCB6+5V+5 VDCB7INTBInterrupt BB8INTDInterrupt DB9PRSNT1ReservedB10RES+V I/O 什5 V or +3.3 V)B11PRSNT2?B12GND(OPEN)(OPEN)Ground or Open (Key)B13GND(OPEN)(OPEN)Ground or Open (Key)B14RESReserved VDCB15GNDResetB16CLKClockB17GNDGroundB18REQRequestB19+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)B2

13、0AD31Address/Data 31B21AD29Address/Data 29B22GNDGroundB23AD27Address/Data 27B24AD25Address/Data 25B25+3.3V+3.3VDCB26C/BE3Command, Byte Enable 3B27AD23Address/Data 23B28GNDGroundB29AD21Address/Data 21B30AD19Address/Data 19B31+3.3V+3.3 VDCB32AD17Address/Data 17B33C/BE2Command, Byte Enable 2B34GND13Gro

14、undB35IRDYInitiator ReadyB36+3.3V06+3.3 VDCB37DEVSELDevice SelectB38GND16GroundB39LOCKLock busB40PERRParity ErrorB41+3.3V08+3.3 VDCB42SERRSystem ErrorB43+3.3V09+3.3 VDCB44C/BE1Command, Byte Enable 1B45AD14Address/Data 14B46GND18GroundB47AD12Address/Data 12B48AD10Address/Data 10B49GND20GroundB50(OPEN

15、)GND(OPEN)Ground or Open (Key)B51(OPEN)GND(OPEN)Ground or Open (Key)B52AD8Address/Data 8B53AD7Address/Data 7B54+3.3V12+3.3 VDCB55AD5Address/Data 5B56AD3Address/Data 3B57GND22GroundB58AD1Address/Data 1B59VCC08+5 VDCB60ACK64Acknowledge 64 bit ?B61VCC10+5 VDCB62VCC12+5 VDCB63RESReservedB64GNDGroundB65C

16、/BE6#Command, Byte Enable 6B66C/BE4#Command, Byte Enable 4B67GNDGroundB68AD63Address/Data 63B69AD61Address/Data 61B70+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)B71AD59Address/Data 59B72AD57Address/Data 57B73GNDGroundB74AD55Address/Data 55B75AD53Address/Data 53B76GNDGroundB77AD51Address/Data 51B78AD49Address/Data 49B79+5V+3.3VSignal Rail+V I/O 什5 V or +3.3 V)B80AD47Address/Data 47B81AD45Address/Da

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