Intel AT80604004881AA User Manual

Intel® Xeon® Processor 7500 Datasheet, Volume 1

Electrical Specifications

See

Chapter 5

for the pin signal definitions. All of the signals on the processor Intel®

QPI and Intel

SMI signals are in the differential signal group.

2.5.1

Intel® QPI Signaling Specifications

Intel® QPI electrical specifications call out specifications that are common across all
platforms and specifications that target Intel® QPI within Enterprise MP class server
systems.

2.5.1.1

Intel® QPI Reference Clocking Specifications

Reference clock requirements required by the PLL as measured at the package pin.

Table 2-9

provides a list of system clock specifications.

Figure 2-4. Active ODT for a Differential Link Example

Signal

Figure 2-5. Validation Topology for Testing Specifications of the Reference Clock

Figure 2-6. Differential Waveform Measurement Points