Intel Xeon Processor Multiprocessor Platform Design Guide

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System Bus Routing
scan test will not be functional if these pins are connected together. TESTHI4 must always be
pulled up independently from the other TESTHI pins.
6.4.2.9 Topology 9: SKTOCC# Signal
The SKTOCC# signal is an output from the processor used as an indication of whether a processor
is installed or not. It will be asserted low when a processor is installed in the socket and will float
when there is no processor present. SKTOCC# can be used to disable the VRM output for
unpopulated processor sockets, the system power supply output when no processors are installed
and other features.
6.4.3 Debug Port Signals Routing Guidelines for 4-way
Configurations
The debug port design information can be found in a separate document. The routing of the signals,
the signal levels, and all other information required to develop a debug port on this platform can be
found in the ITP700 Debug Port Design Guide. See Section 1.1, “Related Documentation” on
page 1-11 for more details.