The synthesis of self-test control logic

O.F. Haberl, H.-J. Wunderlich
Proceedings. VLSI and Computer Peripherals. COMPEURO 89  
Insnlule of ComputCl" Design and F~ult TolCTal'lCe (Prof. Dr. -Ing. D. Schnud) Universily of Karlsruhe Haid-und-Neu-Stra!le 7. D-75OO Karlsruhe I A.tIW:iJI.l; I.n n:cmI years. ml\Jly buill-in KJf-IC$!lcchniques hive been proposed based on feedbiCk. shift-registers for pauem generation and signature analysis. SUI in general.!hcse ICSI·n:giSlers C&IVIOI!est several modules of !he ehlp concum:nlly. lnd !hey tlavc 10 be ronuolled by an extemalll!,llOlDaDc 1CsI equipnen!. TIle presenlCd paper
more » ... senlCd paper proposes I melhod 10 in!egrtlC lbe additionallC$! control logic into tho:: chip. Bued on I register transfer description of!he circuil. !he test control is derived and an acanding fillile aUlOmaton is synlhesized. A hardware implernenwioo is proposed. rnulling in circuits, where !he entire scII·\C!.I only oonsists in activating the tesI roode. clocking and evalullinjj the overall sigrWWC. llirurod ygjpn Most self-tcs\1CdIniques are implcmc:nlCd by mUlli-functional rcgis!eT$., which gertCrale ICSI pilICms and compress ICSt responses during special operation modC:S. The SI)·ciIled BILBO (buill·in logic block observer) bA'iCd on st.andanllincar feedback shilt-registers (LFSR) generates pseudo-!mdom patterns iICCOOIing to I unifonn distribution [I). Weighted patterns can be generaled by I so-calJed OURT (genentor of \Il"Ie![uiprohable random ICSts) using modll1ar LFSRs (2). providing I higher faull coverage by shoner test lengths. Many other BIST (built-in self-tcsl)-registers have been proposed supponing a pseudo·random. delenninistic or I (pscudo-)
doi:10.1109/cmpeur.1989.93499 fatcat:chjqt7hkrnardbwrtvmmtn3tzm