Constant Pins

Like Bus Disable Values, Constant Pins allow you to define pins which XJTAG will keep in a constant state during automated testing such as the Connection Test.

A Constant pin is observed during automated testing but will be overridden during XJEase testing if a bus value is set which conflicts with the constant value.

A constant pin can have one of 3 values: High, Low or Input. A value of Input means that Connection Test will not drive the net containing this pin, and nor will it analyse the behaviour of this net if it can be read during the test.

Constant pins are set up using the Constant Pins Screen.