Intel E5504 AT80602000801AA User Manual

Product codes

AT80602000801AA

Intel

Xeon

Processor 5500 Series Datasheet, Volume 1

Intel® Xeon® Processors 5500 Series Electrical Specifications

Intel

Xeon

Processors 5500

Series Electrical Specifications

2.1

Processor Signaling

Intel

Xeon

Processor 5500 Series include 1366 lands, which utilize various signaling

technologies. Signals are grouped by electrical characteristics and buffer type into
various signal groups. These include Intel

QuickPath Interconnect, DDR3 (Reference

Clock, Command, Control and Data), Platform Environmental Control Interface (PECI),
Processor Sideband, System Reference Clock, Test Access Port (TAP), and Power/Other
signals. Refer to

Table 2-5

for details.

Detailed layout, routing, and termination guidelines corresponding to these signal
groups can be found in the applicable platform design guide (Refer to

Section 1.2

Intel strongly recommends performing analog simulations of all interfaces. Please refer
to

Section 1.2

for signal integrity model availability.

2.1.1

Intel QuickPath Interconnect

Intel Xeon Processor 5500 Series provide two Intel QuickPath Interconnect ports for
high speed serial transfer between other enabled components. Each port consists of
two uni-directional links (for transmit and receive). A differential signaling scheme is
utilized, which consists of opposite-polarity (D_P, D_N) signal pairs.

On-die termination (ODT) is included on the processor silicon and terminated to V

Intel chipsets also provide ODT, thus eliminating the need to terminate on the system
board.

Figure 2-1

illustrates the active ODT.

2.1.2

DDR3 Signal Groups

The memory interface utilizes DDR3 technology, which consists of numerous signal
groups. These include: Reference Clocks, Command Signals, Control Signals, and Data
Signals. Each group consists of numerous signals, which may utilize various signaling
technologies. Please refer to

Table 2-5

for further details.

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

Signal