Intel Pentium 4 User Manual

Platform Clock Routing Guidelines
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 57
4.4.2 66 MHz Clock Routing Length Guidelines
Table 8. 66 MHz Clock Routing Length Guidelines
Clock Group Length of Trace A (in) Length of Trace B (in) R1 (Ω)
AGP_66 0” to 0.5” Z 33
CLK_66 0” to 0.5” Z + (4” – 5”) 33
NOTE: The routing length value of Z is 5 to 9 inches.
Figure 28 and Figure 29 show the recommended clock routing topologies for the 66 MHz clocks.
Figure 28. AGP_66 Clock Routing Topology
AGP Connector
R1
A
CK00
Clock
Synthesizer
B
Clk_Routing_AGP-66
Figure 29. CLK_66 Clock Routing Topology
R1
A
CK00
Clock
Synthesizer
MCH
R1
ICH2
AB
B
Clk_Routing_CLK-66
4.4.2.1 3V66 Clock Routing Requirement for Intel
®
82850E Platforms
The 3V66 trace (CK_G_66M_MCH) from the Clock Chip to MCH cannot be shorter than the
CPU Clock trace (CK_H_100M_MCH, CK_H_100M_MCH).

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