1、NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD608211991AMENDEMENT 1AMENDMENT 11999-01JPour prix,voir catalogue en vigueurFor price,see current catalogueCODE PRIXPRICE CODEAmendment 1VMEbus Microprocessor system busfor 1 byte to 4 byte dataAmendement 1Bus VMEbus Bus systme microprocesseurspour donnes
2、 de 1 octet 4 octets IEC 1999 Droits de reproduction rservs Copyright-all rights reservedInternational Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300 e-mail:inmailiec.chIEC web site http:/www.iec.ch Commission Electrotechnique Internationale International Electr
3、otechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60821 Amend.1 IEC:1999(E)FOREWORDThis amendment has been prepared by subcommittee 26:Microprocessor systems,of the JointTechnical Committee ISO/IEC JTC 1:Informatio
4、n technology.The text of this amendment is based on the following documents:TextReport on votingISO/IEC JTC1/SC 26 N 237ISO/IEC JTC1/SC 26 N 218Full information the voting for the approval of this amendment can be found in the report onvoting indicated in the above table._CHAPTER 2:IEC 60821 BUS DAT
5、A TRANSFER BUSPage 672.2.4.5 WRITE*Replace the first sentence of this subclause by the following:WRITE*is a level significant signal line that is strobed by the falling edge of the first datastrobe(DSA*)and is valid as long as any data strobe(DSA*or DSB*)is low.Page 892.3.6 Basic data transfer capab
6、ilitiesReplace Rule 2.65 by the following:D08(O)SLAVES MUST NOT respond by driving DTACK*low during cycles that request accessto byte locations BYTE(0),BYTE(2),BYTE(1-2),BYTE(2-3),BYTE(0-2),BYTE(1-3),orBYTE(0-3).Insert,at the end of Suggestion 2.8,the following text:4)When a D08(O)SLAVE is requested
7、 to do a BYTE(0)or BYTE(2)transfer.Page 93Table 2-10 Mnemonics that specify basic data transfer capabilitiesReplace in the third column the words can accept and can monitor by must accept andmust monitor.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BO
8、OK SUPPLY BUREAU.60821 Amend.1 IEC:1999(E)3 2.3.7 Block transfer capabilitiesAdd,on page 95,at the end of Rule 2.12,the words in the address space.Replace,on page 97,at the end of the first sentence of Observation 2.87,D08-D15 byD00-D15.Page 99Table 2-11 Mnemonic that specifies block transfer capabi
9、litiesReplace,in the third column,the words Can accept and Can monitor by Must accept andMust monitor.Page 101Table 2-12 Mnemonic that specifies read-modify-write capabilitiesReplace,in the third column,the words Can accept and Can monitor by Must accept andMust monitor.Page 1032.3.9 Unaligned trans
10、fer capabilitiesPage 105Table 2-13 Transferring 32 bits of data using multiple byte transfer cyclesReplace,in row B,line 3,and line 6,Group 1,BYTE(0)by GROUP 2,BYTE(0).Replace,in row D,line 6,D00-D23 by D00-D07.Page 107Table 2-14 Transferring 16 bits of data using multiple byte transfer cyclesReplac
11、e,in row F,line 1,D08-D15 by D00-D07.Replace,in row F,line 2,D16-D23 by D08-D15.RULE 2.6Replace,at the beginning of the sentence,D08(0)by D08(O)Replace the text before table 2-15 and after RULE 2.6 by:Table 2-15 lists how the unaligned transfer(UAT)mnemonic is used to describe MASTERSand SLAVES.LICE
12、NSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 60821 Amend.1 IEC:1999(E)Table 2-15 Mnemonic that specifies unaligned transfer capabilityReplace table 2-15 by the following revised table:The following mnemonicWhen applied to aMeans that
13、itUATD32 MASTERD32 SLAVECan generate the following cycles:MUST accept the following cycles:Quad byte read cycles:BYTE(0-3)READQuad byte write cycle:BYTE(0-3)WRITETriple byte read cycles:BYTE(0-3)READBYTE(1-3)READTriple byte write cycles:BYTE(0-2)WRITEBYTE(1-3)WRITEDouble byte read cycles:BYTE(1-2)RE
14、ADDouble byte write cycles:BYTE(1-2)WRITEPage 109Table 2-16 Mnemonic that specifies ADDRESS-ONLY capabilityReplace,in the first column,AD0 by ADO.Page 133Table 2-17 Timing diagrams that define MASTER,SLAVE and LOCATION MONITORoperationReplace,in the first row of the first column,AD0 by ADO.Page 135T
15、able 2-18 Definitions of mnemonics used in tables 2-19,2-20 and 2-21Replace,in the seventh row,DRIVEN BY SLAVE by DRIVEN BY SLAVE?.Page 139Table 2-20 Use of DS1*,DS0*,AO1 and LWORD*during the various cyclesReplace,in the first row,AD0 by ADO.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL US
16、E AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60821 Amend.1 IEC:1999(E)5 Page 141Table 2-21 Use of the data lines to transfer dataReplace,in the first row,AD0 by ADO.CHAPTER 3:IEC 60821 BUS DATA TRANSFER BUS ARBITRATIONPage 2133.3.1 ARBITERReplace,on page 215,in the first sentence of the eighth paragraph,BRO*by BR0*andBGOIN*by BG0IN*.Page 2213.3.2 REQUESTERReplace,on page 225,RULE 3.14 by the following:After having been granted the bus,the FAIR ARBITER MUST monitor its bus request line
