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JTAGLive is a three module PCB debugging tool that uses boundary-scan technologies.
Debugging boards too crowded for traditional probing just got a whole lot easier. Best of all, you can get started absolutely free of charge with JTAG Live's Buzz module. With Buzz, you can quickly drive, sense and sample pins and simple clusters. Two other modules, Clip and Script, available to order, measure multiple signals and more complex clusters. JTAG Live capitalizes on the boundary-scan resources found on today's complex digital circuit boards. There is no need for a netlist, just the devices' BSDLs, to give you access to all of the I/Os for driving and sensing.