Intel EP80579 Guide

Intel
®
EP80579 Integrated Processor Product Line May 2010
Order Number: 320068-005US 132
System Memory Interface (DIMM)—Intel
®
EP80579 Integrated Processor Product Line
9.7.3.2 DDR_CRES1, DDR_CRES2
The EP80579 provides the DDR_CRES1 and DDR_CRES2 signals as additional
compensation resistors (See Figure 84). Intel recommends 20 mil wide traces with a
minimum spacing of 12 mils from other signals. When breaking out from the EP80579,
maintain a minimum spacing of 4.5 mils spacing up to a maximum length of 500 mils.
For the best signal integrity, minimize this length as much as possible.
Figure 83. DDR_SLWCRES, DDR_RCOMPX, DDV_CRES, & DDR_CRES0 Routing Topology
DDR_RCOMPX
249 Ω, 1%
825 Ω, 1%
DDR_CRES0
DRV_CRES
DDR_SLWCRES
825 Ω, 1%
Figure 84. DDR_CRES1 and DDR_CRES2 Signal Connections
DDR_CRES2
DDR_CRES1
VCC18
0.1uF
100
Ω
1 %
100
Ω
1 %

Intel EP80579 Specifications

General

Brand	Intel
Model	EP80579
Category	Computer Hardware
Language	English