For years, the industry has been grappling with how to access, control and operate instruments that have been embedded in chips. The problem wasn’t that the instruments couldn’t be accessed. Instead, there were too many access methods, each proprietary or customized by the chip supplier. The IEEE 1687 IJTAG standard changed this. Not only has IJTAG standardized the access method, but it’s also widened the scope of re-use for embedded instruments. Rather than being limited to just chip characterization, test and debug, IJTAG enables re-use of instruments and their test vectors to validate, test and debug circuit boards as well.