EEVblog #499 - What is JTAG and Boundary Scan?

What is the JTAG interface and Boundary Scanning, how does it work, and what is it useful for? The XJTAG unit: Forum: EEVblog Main Web Site: EEVblog Amazon Store: Donations: Projects: Electronics Info Wiki: Теги: Boundary Scan,Joint Test Action Group,jtag,xjtag,xilinx,altera,fpga,arm,microcontroller,arm microcontroller,Field-programmable Gate Array (Consumer Product),demo,how to,bsdl,boundary scan description language,icsp,flash memory,daisy chain,XJLink2