ABB 3BHB005922R0001
ABB3BHB005922R0001UNS0880a-p,v1ABB3BHB005922R0001UNS0880a-p,v1ABB3BHB005922R0001UNS0880a-p,v1===============================================================(1)全部单元中写0;(2)读A0单元的0,然后再改写为1,然后读A1的0,再改写A1为1,直到An-1。这样所有单元均为1;(3)然后从An-1到A0作读1写0再读0的操作。该算法的操作次数为O(N),能检测全部的SAF故障、AF故障以及TF故障。5一种基于棋盘算法的改进及实现通过研究和对比上述3个算法发现,Checkerboard(棋盘)算法和March算法以线性方式进行读写,因此存储器操作次数与存储器容量N成正比,Gallop算法虽然有较高的故障覆盖率,但由于其对存储器刺激次数过多,因此,在实际测试中不是一种很经济的测试算法,Checkerboad算法只实现了0→1或1→0的读写,所以不能测试变迁故障。而March算法恰恰实现了这两个状态的转换,但March算法操作次数(6N)要多于Checkerboard算法的操作次数(4N),对于大容量存储器的测试,March算法将需要比Checkerboard算法更多的测试时间来完成整个测试过程,因此结合March算法的特点,对Checkerboard算法进行如下改进。(1)对分块a(b)中单元写1(0);(2)对分块a(b)中的单元写0(1);(3)读所有单元;(4)对分块a(b)中的单元写1(0);(5)读所有单元。这样整个存储器就同时经历了由0→1和1→0两个读写状态,就可以测试出变迁故障,写改进后Checkboard算法对存储器的操作次数为5N次,而March算法对存储器的操作次数则需要6N次,大大地节省了测试时间。以一个X(行地址)、Y(列地址)地址复用的128×128的存储器矩阵为例,按改进后的算法编写的测试图形片断如图6。测试图形片断实际的算法图形要配合读写的时序,因此图形更为复杂,但对存储器的操作次数与理论是一致的,改进的Checkerboard算法虽然使用了较少的存储器操作次数,但其只能诊断出部分AF故障,与March算法相比,是以牺牲故障覆盖率为代价来提高测试速度的。在实际的生产型测试中,地址译码模块由于结构较存储矩阵要简单得多,因此出现故障的概率远远小于存储矩阵,且改进的Checkerboard算法也能诊断部分的AF故障,是一种经济的测试算法。6结语文章在理解分析的基础上结合各算法的特点对Checkerboard算法进行了改进及实现,通过研究发现,任何事物都有两面性,每种算法对不同的类型故障的探测能力各有千秋,但不会尽善尽美,改进的算法虽然提高了测试速度,但这种改进牺牲了故障覆盖率。但就实际的测试需要而言,是完全符合要求且行之有效的,在实际应用中,要根据存储器的故障类型和测试需求来选择合适的诊断算法,才能达到满意的效果。IC697BEM7114IC660TSA1003IC697BEM7133VMIVME-77503IC200ALG3202IC200MDL6502DS200DCFBG1BLC2DS200LDCCH1ALA2IC200CHS001底座2IC200MDL6402IC697BEM7312IC697CPX9352IC697MDL7402VMIVME-31222IC660BBD0242269PLUS-10C-1201469-P5-HI-A20-E1469-P5-HI-A20-E1D20M1DS200ADGIH1AAA1HE693RTD6001IC660EBD0201IC660ELB912G1IC693APU3011IC693CMM3111IC693PCM3111IC693PWR3301IC697ALG2301IC697BEM7331IC697CHS7901IC697CPX7721IC697MDL2501IC697MDL3501IC697MDL6521IC697PWR7101IC697PWR7111IC698CPE0101IC754VSI12CTD-CO1MTM-120(S-A20-120VA)1IC693CPU3741IC693PCM3011IC697CPM9251IC697MEM7131IC698CRE020-ABP21IC698CRE020-AB汇总1IC660BBD0251Honeywell4000103-510582408217-001551400700-100251401286-100251403776-1003513-04754-1501620-00411TC-CCR0141TC-PRS0211KEBADI3253DO32133HAC023195-0011ES100S1PS2401SI1011SI2321TT08102203-76141KUKAKSD1-1610KSD1-322KSD1-482001-04-9821DSE-IBSC33/1.401KCP21KSD1-081MITSUBISHIBN624A960H03B1BN624A96IG52A1FCUA-DX1101MOTOROLAXVME-6741MVME147-0132MVME162-522A2MVME162PA-SE3442MVME712M2MPC7501MVME117A1MVME162-023A1MVME162-0321MVME162-2101MVME162-2201MVME162-5121MVME162-522A01-W3960B/61C1MVME162P-344SE1MVME162PA1MVME167-33B1MVME172-263/2601MVME2301-9001MVME2604712I/O1MVME3001MVME51001MVME55001VMIVME-25401XVME-9571PHOENIXFLMC10BASE-T/FOG8501IBS24BK-I/O-T1IBSPCISC/I-T1QUINTPS-100-240AC/24DC/101PhonixKlemmen20064-32019566-829662-829668-119765-21REXROTHCSB0.1C-PL-ENS-MR1-NN-S-NN-FW1DKC03.3-040-7-FW1HCS02.1E-W0028-A-03-NNNN1HDD02.2-W040N-HD12-01-FW1HDS02.2-W040N-HT17-01HSM01.1-FW1TV3000HTPUMF1VT3000S34-R51VT3006S35R11SABOMPB.533.00PLM500(AEB.550.00)2SABO汇总2SAIAPCD2.A4002PCD4.B9001SAIA汇总3SANKYOPC100211SANKYO汇总1SANYOSTNM-DR-160B(U)2STNM-DR-250B(U)2SEW31C075-503-4-003EF-014-503331C005-503-4-00231C450-503-4-001DFP21A1DIP1MDF60A-0022-5A3-4-001MDF60A-0075-5A3-4-001MDS60A0022-5A3-4-001MDV60A0075-5A3-4-0T1MDV60A0110-5A3-4-001MKS51A005-503-50131C015-503-4-002SST5136-PFB15136-PFB-ISA15136-PFB-VME1SLO-SYNM063-LE-507E1VEXTAA3897-94121DGM60-ASAK1PH266-01GK-C51WOODWARD5464-41419907-16419907-2521XYCOMXVME-6535XVME-6744ProtoXVME-0851XVME-5301XVME-9761YASKAWADI-017DO-017217IF49200SHCPU3JAMSC-B10503JAMSC-B10622JAMSC-B10632JRCP-3171122LIO-012PS-012PS-022SGMAH-02AAA212216IF1218IF19200SHSVA1AI-011CACR-02-TE3BUC1CPS-150F2DDSCR-U84-241JACP-3179001JAMSC-B10701JAMSC-B10711JAMSC-C81201JAMSC-C81601JAMSC-IF63V1JAMSI-B10311JANCD-CP50B1JANCD-JSP04-11JANCD-XCP01-12JEPMC-MC0011JEPMC-PC0401JRMSI-B10261JRMSP-P81011JUSP-NS3001JUSP-WS15AB1JZNC-XIU01B1JZNC-XPP02B1LASC-100W81MB-011SGDS-08A01A1贝莉IMCIS0217IMDSI0213IPSYS0113IMDS00212IMMFP019IPFLD244IEPAS022IEPAS011IMDS0031IMMPI011IMSPM011HP/Agilent83650BHP/Agilent8720ES83640BSynthesizedHP/Agilent8564EE8241APSG-LAgilentE4407BENI5100L-NMRHP/Agilent4194AHP/Agilent8757D70910AWideBandwidthRFSectionAnritsuMS2711D5087-7281MultiplierHP/Agilent8752CHP/Agilent8563AHP/Agilent8593E8593EPortableHP/Agilent85056DHP/Agilent3458AHP/Agilent8530AHP/Agilent5087-7277HP/Agilent5087-7031HP/Agilent5087-7070HP/Agilent5086-788435670AFFTDynamicHP/Agilent8648DHP/Agilent11793AHP/Agilent8648DHP/Agilent5361BHP/AgilentE4403-60074HP/AgilentE4403-60073HP/AgilentE4433BHP/Agilent85134FHP/Agilent85331-60033HP/AgilentE5071-66571HP/Agilent5086-7620E4422BESG-A8663AHigh-Performanc?e8648CSynthesizedHP/Agilent5087-7034HP/Agilent4191ARFHP/Agilent5086-6981HP/Agilent5087-7709HP/AgilentE4423-60024HP/Agilent5087-7709HP/Agilent5087?-7238HP/Agilent70590AHP/Agilent5086-7589ESA-L1500ASpectrumAnalyzerAndoAQ8423BHP/Agilent85332-60003HP/Agilent83492AHP/AgilentE5071-61015HP/Agilent8530AHP/Agilent08719-60009HP/Agilent5087-7081HP/Agilent85131FAVANTEKY090-3477HP/Agilent4xE5250AHP/Agilent85027BHP/Agilent5086-7583HP/Agilent8720D/8722DHP/Agilent33326-60005HP/Agilent53132AHP/Agilent08722-60015HP/Agilent08753-60003HP/Agilent08360-60166HP/Agilent85046AHP/Ag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