TRST Constants

Also related to Constant Pins and Bus Disable Values are TRST Constants.

Any pin which is used in the graphical representation of a Test Reset Sequence on XJDeveloper's pin mapping screen keeps the value set to it by the waveform of the test reset sequence. Furthermore, a Pulse nTRST step leaves nTRST driving high, so a TRST constant value of high is applied the nTRST pin(s) (unless a waveform step drives nTRST after the Pulse nTRST step is run).

Unlike other types of constant pin, TRST Constants cannot be overridden by XJEase code during XJEase testing.

TRST Constants apply only to pins shown graphically in the reset sequence, as well as nTRST pins in a Pulse nTRST step; pins set during any XJEase functions called by the Test Reset sequence do not automatically become constant.