Joint Test Action Group (JTAG) is the common name for what was later standardized as the IEEE 1149.1 Standard Test Access Port and Boundary-Scan Architecture. It was initially devised for testing printed circuit boards using boundary scan and is still widely used for this application.
Today JTAG is also widely used for IC debug ports. In the embedded processor market, essentially all modern processors implement JTAG when they have enough pins. Embedded systems development relies on debuggers communicating with chips with JTAG to perform operations like single stepping and breakpointing. Digital electronics products such as cell phones or a wireless access point generally have no other debug or test interfaces.
Read more about Joint Test Action Group: Overview, Electrical Characteristics, Communications Model, Example: ARM11 Debug TAP, Common Extensions, Widespread Uses, Client Support, Serial Wire Debug
Famous quotes containing the words joint, test, action and/or group:
“Such joint ownership creates a place where mothers can “father” and fathers can “mother.” It does not encourage mothers and fathers to compete with one another for “first- place parent.” Such competition is not especially good for marriage and furthermore drives kids nuts.”
—Kyle D. Pruett (20th century)
“Our decision about energy will test the character of the American people and the ability of the President and the Congress to govern this nation. This difficult effort will be the “moral equivalent of war,” except that we will be uniting our efforts to build and not to destroy.”
—Jimmy Carter (James Earl Carter, Jr.)
“It is most pleasant to commit a just action which is disagreeable to someone whom one does not like.”
—Victor Hugo (1802–1885)
“He hung out of the window a long while looking up and down the street. The world’s second metropolis. In the brick houses and the dingy lamplight and the voices of a group of boys kidding and quarreling on the steps of a house opposite, in the regular firm tread of a policeman, he felt a marching like soldiers, like a sidewheeler going up the Hudson under the Palisades, like an election parade, through long streets towards something tall white full of colonnades and stately. Metropolis.”
—John Dos Passos (1896–1970)