IEEE Standard 1500 Compatible Interconnect Diagnosis for Delay and Crosstalk Faults

Abstract

Abstract-An interconnect diagnosis scheme based on the oscillation ring (OR) test methodology for systems-on-chip (SOC) design with heterogeneous cores is proposed. In addition to traditional stuck-at and open faults, the OR test can also detect and diagnose important interconnect faults such as delay faults and crosstalk glitches. The large number of test rings in the SOC design, however, significantly complicates the interconnect diagnosis problem. In this paper, the diagnosability of an interconnect structure is first analyzed then a fast diagnosability checking algorithm and an efficient diagnosis ring generation algorithm are proposed. It is shown in this paper that the generation algorithm achieves the maximum diagnosability for any interconnect. Two optimization techniques are also proposed, an adaptive and a concurrent diagnosis method, to improve the efficiency and effectiveness of interconnect diagnosis. Experiments on the MCNC benchmark circuits show the effectiveness of the proposed diagnosis algorithms. In all experiments, the method achieves 100% fault detection coverage and the optimal interconnect diagnosis resolution.

Testing of Soc Interconnects Using Extended Ieee 1500 Standard

“…The authors in Ref. 27 proposed an oscillation ring (OR)based method to detect and diagnose crosstalk faults on SOC interconnects. They modi¯ed IEEE 1500 wrapper cell design to provide extra connections and inversion control in addition to IEEE 1500 standard scan path to construct ORs through the wires and the boundary-scan path in the cores.…”

Maximal Resilience for Reliability and Yield Enhancement in Interconnect Structure

“…A faulty wire e can be identified if the set of rings that pass e is unique; in other words, no other wires are passed by exactly the same set of rings [11]. The diagnosability check can be carried using a diagnosis table (matrix), as shown in Fig.…”

“…Our goal is to find fault-tolerant routing paths for faulty links, and this can be done by using OR-based diagnosis schemes [11] described in Section II as follows. Fig.…”

“…Compatible test mode for the minimum edge coverage and optimal diagnosis resolution, and MR is in normal functional mode for the maximum edge reliability. M T is based on IORT scheme for detection [10], and M D * is based on IORD scheme for diagnosis [11] There are two possibilities for MR: If for bi-or nondirective graphs, MR could be based on M D * ; but for directive graphs, MR is composed of mostly resilience rings. For achieving the maximum reliability, we require the maximal density for each edge in MR. That is, for nondirective graphs, equivalently for M D * ; but for directive graphs, the maximum reliability brought by resilience rings is the maximal coverage for each edge in MR.…”

“…Oscillation test (OR) [8]- [11] is an effective way to detect and diagnose faults in the interconnect structure. Fig.…”