Intel Pentium 4 User Manual

I/O Controller Hub 2
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 149
Figure 104 illustrates the recommended USB schematic:
Figure 104. USB Data Signals
15k
15k
15 ohm
15 ohm
ICH2
P+
P-
USB Connector
< 1"
< 1"
90 ohm
45 ohm
45 ohm
Driver
Driver
USB Twisted Pair CableTransmission Line
Motherboard Trace
Motherboard Trace
Optional 47 pf
Optional 47 pf
The following are Recommended USB Trace Characteristics.
• Impedance ‘Z0’ = 45.4 Ω
• Line Delay = 160.2 ps
• Capacitance = 3.5 pF
• Inductance = 7.3 nH
• Res @ 20° C = 53.9 m Ω
9.5 IOAPIC Design Recommendations
The IOAPIC bus is not required in these designs.
• Processor:
 The processor does not have these pins defined. It receives interrupts for servicing via the
System Bus interrupt delivery mechanism.
• On the ICH2
 Tie PICCLK directly to ground
 Tie PICD0, PICD1 to ground via 1 k Ω to 10 kΩ resistor

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