Fully IEEE1149.1 compatible DFT solution for MIPS CPU CORE

摘要

This article presents a DFT(design-for-test) solution which uses hardware & software cooperation to realize MIPS CPU CORE DET. The hardware is fully compatible with IEEE1149.1 (JTAG), supporting breakpoint, step, internal key register watch function and can be extended. Software uses GUI programming to achieve visual DEBUG. The design in this paper is meaningful for reducing the test costs for CPU design, increasing design efficiency and accumulating experience of DFT strategy for CPU test. It assumes reader familiarity with IEEE1149.1.