Introduction
1.1
Terminology
A ‘#’ symbol after a signal name refers to an active low signal, indicating that the signal is in the
active state when driven to a low level. For example, when RESET# is low, a reset has been
requested. Conversely, when NMI is high, a nonmaskable interrupt has occurred. In the case of
signals where the name does not imply an active state but describes part of a binary sequence
(such as address or data), the ‘#’ symbol indicates that the signal is inverted. For example,
D[3:0] = ‘HLHL’ refers to a hex ‘A’, and D[3:0]# = ‘LHLH’ also refers to a hex ‘A’ (H= High logic
level, L= Low logic level).
The term “System Bus” refers to the interface between the processor and system core logic
(also known as the chipset components). The system bus is a multiprocessing interface to
processors, memory, and I/O.
1.1.1
Processor Packaging Terminology
Commonly used terms are explained here for clarification:
• Intel Pentium 4 processor in the 478-pin package — 0.18-micron Pentium 4 processor core
in the FC-PGA2 package.
• Intel Pentium 4 processor in the 423-pin package — 0.18-micron Pentium 4 processor core
in the PGA package.
• Intel Pentium 4 processor with 512-KB L2 cache on 0.13 micron process — 0.13 micron
version of Pentium 4 processor in the 478-pin package core in the FC-PGA2 package with a
512-KB L2 cache.
• Intel Pentium 4 processor Extreme Edition supporting Hyper-Threading Technology —
0.13 micron version of Pentium 4 processor in the 478-pin package core in the FC-PGA2
package with a 512-KB L2 cache and a 2-MB L3 cache.
• Processor — For this document, the term processor shall mean Pentium 4 processor with
512-KB L2 cache on 0.13 micron process and the Pentium 4 processor Extreme Edition
supporting Hyper-Threading Technology.
• Keep-out zone — The area on or near the processor that system design can not utilize. This
area must be kept free of all components to make room for the processor package, retention
mechanism, heatsink, and heatsink clips.
• Hyper-Threading Technology — Hyper-Threading Technology allows a single, physical
Pentium 4 processor to function as two logical processors when the necessary system
ingredients are present. For more information, see: www.intel.com/info/hyperthreading.
• Intel 875P chipset — Chipset that supports DDR memory technology for the Pentium 4
processor with 512-KB L2 cache on 0.13 micron process. This chipset also supports the
Pentium 4 processor Extreme Edition supporting Hyper-Threading Technology in platforms
that meet the thermal design guidelines for this processor.
• Intel 865G/865GV/865PE chipset — Chipset that supports DDR memory technology for
the Pentium 4 processor with 512-KB L2 cache on 0.13 micron process.
• Intel 865P chipset — Chipset that supports DDR memory technology for the Pentium 4
processor with 512-KB L2 cache on 0.13 micron process.
• Intel 850 chipset — Chipset that supports Rambus RDRAM* memory technology for
Pentium 4 processor with 512-KB L2 cache on 0.13 micron process and Pentium 4 processor
in the 478-pin package.
• Intel 845 chipset — Chipset that supports PC133 and DDR memory technologies for the
Pentium 4 processor with 512-KB L2 cache on 0.13 micron process and Pentium 4 processor
in the 478-pin package.
Intel® Pentium® 4 Processor on 0.13 Micron Process Datasheet
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INTEL [ INTEL ]
