Intel Pentium 4 User Manual

Layout Review Checklist
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 271
16.1.2 Asynchronous GTL+ and Other Signals
√ Recommendations Reason/Impact/Documentation
• FERR# and PROCHOT connects with the
“T” topology. Processor to
T-junction should be 1 inch–12 inches.
Connection to the ICH2 should be made
with no stub. T- junction to pull-up should be
3 inches max. A 7 mil spacing is required.
Trace impedance should be 60
Ω.
• Refer to Section 5.4.1
• A20M#, IGNNE#, INIT#, LINT[1:0],
SLP#,SMI# and STPCLK# connect in a
point-to-point topology. Trace length should
be 12 inches max. A 7 mil spacing required.
Trace impedance should be 60
Ω.
• Refer to Section 5.4.1
• THERMTRIP# connects in a “T” topology.
Processor to T-junction should be 1 inch–
12 inches max. Connection to the ICH2
should be made with no stub. T junction to
pull-up resistor should be 3 inches max.
Trace impedance should be 60
Ω. Trace
spacing should be 7 mils.
• Refer to Section 5.4.1
• PWRGOOD connected in a “T” topology.
Pull-up resistor to T-junction should be
3 inches max. T-junction to processor
should be 1.1 inches max.
T-junction to ICH2 should be 1–12 inches
Trace impedance should be 60
Ω. Trace
spacing should be 7 mils.
• Refer to Section 5.4.1
• THERMDA/THERMDC should connect to
remote sensor within 4-8 inches as long as
worst-case noise sources (e.g., the clock
generator, data and address signals) are
avoided. A 10 mil wide trace recommended.
Shielded twisted pair recommended for long
distance remote sensor.
• Refer to Section 5.4.1
• VCCIOPLL, VCCA, VSSA circuitry should
be routed away from noisy signals or high
free signals. Keep traces as short as
possible.
• Refer to Section 5.5.
• Place 51.1 Ω ±1% resistors as close to
COMP[1:0] as possible
• Refer to Section 5.4.1
16.1.3 Processor Keep-Out Zones
√ Recommendations Reason/Impact/Documentation
• Refer to Chapter 10.

Intel Pentium 4 Specifications

General

Architecture	x86
Core Count	1
Microarchitecture	NetBurst
Manufacturer	Intel
Core Names	Willamette, Northwood, Prescott, Cedar Mill
Virtualization Technology	No
Release Date	November 20, 2000
Clock Speed	1.3 GHz to 3.8 GHz
FSB Speed	400 MHz to 1066 MHz
Socket	Socket 423, Socket 478, LGA 775
Introduced	2000
Product Line	Pentium
Front Side Bus	400 MHz to 1066 MHz
Hyper-Threading	Yes (Prescott and later)
64-bit Support	Yes (Prescott and later)
Instruction Set	MMX, SSE, SSE2, SSE3
Discontinued	2008
Process Technology	180 nm, 130 nm, 90 nm, 65 nm
L2 Cache	256 KB, 512 KB, 1 MB, 2 MB
Lithography	180 nm, 130 nm, 90 nm, 65 nm
L1 Cache	8 KB