Intel Pentium 4 User Manual

Layout Review Checklist
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 277
√ Recommendations Reason/Impact
• ALL RSL, CMD/SCK and
CTM/CTM#/CFM/CFM# signals have
CTABs on each RIMM connector pin.
• Compensation for the inductance of the
connector. Voltage and timing margins may
be reduced with CTABs.
• Refer to Section 6.1.2.5.
• CTABs must not cross (or be on top of)
power plane splits. They must be
ENTIRELY referenced to ground.
• Refer to Section 6.1.2.5.
• All RSL signals are routed adjacent to a
ground reference plane.
• This includes all signals from the 2nd RIMM
connector to the termination. If signals are
routed referenced to ground from the 2nd
RIMM connector to the termination, the
ground reference plane MUST extend under
these signals AND include the groundside of
the V
TERM
decoupling capacitors.
• The traces for CMD and SCK must have a
neck down from 18-mil traces to 5-mil
traces for 175-mils on either side of the
SCK/CMD attach point.
• To minimize impedance discontinuities.
Refer to Section 6.1.7.
• Voltage divider network go reference voltage
generation should be within 1.5 inches of
the MCH V
REF
ball.
• Refer to Section 5.5.
• RSL traces do not cross power plane splits.
RSL signals must also not be routed
next to
a power plane split
• To maintain signal integrity.

Intel Pentium 4 Specifications

General

Brand	Intel
Model	Pentium 4
Category	Computer Hardware
Language	English