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TOOLS
While an ITP requires only that the Pentium Pro processors be in the scan chain, Figure 16-8
shows a more complex case. The order in which you place the components in your scan chain is
up to you. However, you may need to provide scan chain layout information to the ITP so it
knows where the CPUs are in the chain. Note that additional components should not be included
in the boundary scan chain unless absolutely necessary. Additional components increase both
the complexity of the circuit and the possibility for problems when using the ITP. If possible, lay
out the board such that the additional components can be removed from the scan chain for debug.
.
Pentium®
Pentium
Pro
Pro
®
Figure 16-8. Pentium
Pro Processor-Based System Where Boundary Scan is Used
16-11
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