Intel Pentium 4 User Manual

Schematic Review Checklist
R
266 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
15.7.15 Power
Checklist Items Recommendations Reason/Impact
V_CPU_IO[1:0] • The power pins should be connected
to the proper power plane for the
processor's asynchronous AGTL+
signals. Use one 0.1 µF decoupling
capacitor.
• Used to pull up all processor
interface signals.
VccRTC • No clear CMOS jumper on VccRTC.
Use a jumper on RTCRST# or a GPI,
or use a safemode strapping for Clear
CMOS
Vcc3_3 • Requires six 0.1 µF decoupling
capacitors.
VccSus3_3 • Requires one 0.1 µF decoupling
capacitor.
Vcc1_8 • Requires two 0.1 µF decoupling
capacitors.
VccSus1_8 • Requires one 0.1 µF decoupling
capacitor.
V5REF_SUS • Requires one 0.1 µF decoupling
capacitor.
• V5REF_SUS only affects 5 V
tolerance for USB OC[3:0]# pins and
can be connected to VccSUS3.3 or
5V_Always/5V_AUX if 5 V tolerance
on OC[3:0]# is not required. If 5 V
tolerance on OC[3:0]# is needed then
V5REF_SUS USB must be connected
to 5V_Always/5V_AUX which remains
powered during S5.
V5REF • V5REF is the reference voltage for 5 V
tolerant inputs in the ICH2. Tie to pins
VREF[2:1]. V5REF must power up
before or simultaneous to VCC3_3. It
must power down after or
simultaneous to VCC3_3.
• Refer to Section 12.6 for an
example circuit schematic that may
be used to ensure the proper
V5REF sequencing.

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