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JTAG （JOINT EUROPEAN TEST ACTION GROUP） was established by the Europe Institution in 1985, in order to research the test of volume circuit . After cooperating with the North American ,The name was changed into JTAG(JOINT TEST ACTION GROUP).
The IEEE1194.1 testing interface and board scan structure [IEEE1149.1b 1194] were put out in base of JTAG 2.0 testing testing standards in 1990 , it also becomes the standards of ANSI（AMERICAN NATIONAL STANDARDS INSTITUTE ）