Intel Pentium 4 User Manual

Platform Clock Routing Guidelines
R
46 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
4.2 BCLK[1:0] Frequency Select
4.2.1 100 MHz Operation – Intel
®
82850 Chipset
The BCLK[1:0] frequency should be set for 100 MHz operation for the 82850 chipset. This is
accomplished with a 470 Ω pull-down on the CK-00 SEL100/133 input. In addition, the platform
should be prevented from operating with a processor that requires a BCLK[1:0] frequency other
than 100 MHz. The correct frequency select circuitry is show in Figure 16.
Figure 16. BCLK[1:0] Frequency Select for 100 MHz System Bus Operation
470Ω
CK-00Processor
3.3V
SEL 100/133
PWRDWN#
BSEL0
1kΩ
1kΩ
3.3V
BCLK_Freq_Sel

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