Intel 9140N NE80567KE025009 User Manual

Product codes

NE80567KE025009

Intel

Itanium

Processor 9300 Series Datasheet

Electrical Specifications

This chapter describes the electrical specifications of the Intel Itanium processor 9300
series.

2.1

Intel

QuickPath Interconnect and Intel

Scalable Memory Interconnect Differential

Signaling

The links for Intel

QuickPath Interconnect (Intel

QPI) and Intel

Scalable Memory

Interconnect (Intel

SMI) signals use differential signaling. The Intel SMI bus pins are

referred to as FB-DIMM pins on the package. The termination voltage level for the
processor for uni-directional serial differential links, each link consisting of a pair of
opposite-polarity (D+, D-) signals, is V

Termination resistors are provided on the processor silicon and are terminated to V

SS,

thus eliminating the need to terminate the links on the system board for the Intel
QuickPath Interconnect and FB-DIMM signals.

When designing a system, Intel strongly recommends that design teams perform
analog simulations of the Intel QuickPath Interconnect and FB-DIMM pins. Please refer
to the latest available revision of the Intel

Itanium

Processor 9300 Series Platform

Design Guide.

Figure 2-1

illustrates the active on-die termination (ODT) of these differential signals.

All the differential signals listed in

Table 2-1

have ODT resistors. Also included in the

table are the debug signals.

Figure 2-1. Active ODT for a Differential Link Example

Signal