A simple wrapped core linking module for SoC test access

Abstract

For a system-on-a-chip (SoC) comprised of multiple IP cores, various design techniques have been proposed to provide diverse test link configurations. In this paper we introduce a simple flag based wrapped core linking module (WCLM) that enables systematic integration of IEEE 1149.1 TAP'd cores and P1500 wrapped cores. Compared with other state-of-art techniques, our technique requires no modification to each core, uses less area, and provides more diverse link configurations.