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194 Chapter 10
Scan test
Running the est GUI
Scan window
The scan window provides means of testing the system scan rings.
Figure 50 shows the est scan window.
NOTE For more information on scan rings and modes, see the IEEE 1149.1
JTAG specification.
Figure 50 est scan window
The window has three panels: Ring, Scan, and Pattern.
Clicking the buttons in the Ring panel has the following effect:
All—Tests all available rings in the system.
Select—Allows the user to test a particular ring by entering the ring
number to be tested in the Ring Nbr field.