Joint Test Action Group. IEEE Std 1149.1-1990, Test Access Port and Boundary-Scan Architecture (3) The JTAG interface is a serial bus with four signals: Test Clock (TCK), Test Mode Select (TMS), Test Data Input (TDI), and Test Data Output (TDO).
Joint Test Access Group (likewise synonym for test strategy)
hardware interface for testing integrated circuits on the board
Joint Test Action Group. (1) Test standards group working on boundary scan and standard test interfaces. (2) Any of the standards approved by this group.
Joint Test Action Group (interface for in-circuit debugging and testing)
Joint Test Action Group. Formerly a group of European and later American companies that developed a boundary scan technique to facilitate in-circuit testing and functionality testing of circuit boards. It was handed off to the IEEE and refined as IEEE Standard 1149.1.
Joint Test Action Group. Older name for IEEE 1149.1 boundary scan, a method to test pc-boards and also ICs.
Joint Test Action Group A standard (see "IEEE Standard 1149.1") that defines how to control the pins of JTAG compliant devices. Here: An on-chip debug interface supported by a special hardware port on some processors. It allows to take full control over the CPU with minimal external hardware, in many cases eliminationg the need for expensive tools like In-Circuit-Emulators.
(jay tag) abbr. A standard for providing external test access to integrated circuits serially, via a four- or five-pin external interface. Short for Joint Test Action Group, which developed the standard. The JTAG standard has been adopted as an IEEE standard (IEEE 1149 Standard Test Access Port and Boundary-Scan Architecture). JTAG ports have been widely embraced by processor manufacturers. Debug monitors and in-circuit emulators increasingly leverage the capabilities inherent in JTAG. [ more
JTAG, an acronym for Joint Test Action Group, is the usual name used for the IEEE 1149.1 standard entitled Standard Test Access Port and Boundary-Scan Architecture for test access ports used for testing printed circuit boards using boundary scan.
