XJTAG has partnered with Zuken create a new plugin for Design Gateway and is offering it free of charge. The plugin, called XJTAG DFT Assistant, helps to validate correct JTAG chain connectivity, while displaying boundary scan access and coverage onto the schematic diagram through full integration with Design Gateway. So if you are using boundary scan today or want to incorporate it in your next design, the XJTAG DFT Assistant plugin is a tool you should be using
As products get smaller and printed circuit boards become more dense, the boundary scan function becomes more and more important. Why? Because the physical space requirements for test points, ideally 0.035″ to 0.045″(.89mm to 1.14mm), is simply not available. Another factor to consider is the high pin count BGA where soldering 100s or 1000s of pins can easily create shorts or opens. These faults can stop a board from ever getting to the functional test phase for debug.