What is JTAG

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Or the Joint Test Action Group is an association created in the mid 80s when a group of companies came together to solve the problem of debugging and testing chips while dealing with the increasing complexity of the devices.

to overcome this problem the manufacturers came up with the standard that allows them to embed a piece of HW into the chips itself to allow easier testing of various pin present in different chips of the PCB (Printed Circuit Board) this methodology was standardized by IEEE 

named as IEEE 1149.1






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