EP80579 Datasheet, PDF (1846/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Figure 49-13.DDR2 Command Clock to DQS skew
DDR_CK
DDR_CK#
T_{skew_CK-DQS}
T_{skew_CK-DQS}
DDR_DQS
0.5xVCC
B6564-01
49.5.3
49.5.3.1
49.5.3.2
PCI Express*
This section describes the electrical characteristics of the PCI Express* interface.
The PCI Express* interface signals are driven by transceivers designed specifically for
high-speed serial communication. All PCI Express* signals are fully differential and
operate in a current mode, rather than a voltage mode. These interfaces support A/C
coupling to facilitate communication across independent power supply domains and
signal at a rate well above the flight time of the interface. The nominal supply voltage
for the PCI Express* interfaces is 1.2V, although receivers must tolerate up to 1.6V
peak-to-peak across differential pairs as required by the PCI Express* Interface
Specification.
This section describes the electrical characteristics of the PCI Express* interface.
PCI Express* Signal List
For PCI Express* pin description refer to Table 48-9, “PCI Express Interface Signals” on
page 1741.
PCI Express* Differential Transmitter and Receiver Specifications
This electrical specifications of the PCI Express* Differential Transmitter and Receiver in
the EP80579 are compliant with the PCI Express* Base Specification, Rev. 1.1 (http://
www.pcisig.com). Refer to the specification subsections that follow for more
information:
• Section 4.3 Electrical Sub-Block of PCI Express* Base Specification, Rev. 1.1:
— Section 4.3.1 Electrical Sub-Block Requirements
— Section 4.3.2 Electrical Signal Specifications
— Section 4.3.3 Differential Transmitter (Tx) Output Specifications
— Section 4.3.4 Differential Receiver (Rx) Input Specifications
— Section 4.3.3.1 Tx Compliance Eye Diagrams
— Section 4.3.3.1 Rx Compliance Eye Diagrams
Intel^® EP80579 Integrated Processor Product Line Datasheet
1846
August 2009
Order Number: 320066-003US