Intel III Xeon 500 MHz 80525KX500512 User Manual
Product codes
80525KX500512
Pentium
®
III Xeon™ Processor at 500 and 550 MHz
78
Datasheet
7.3.2.3
Thermal Evaluation for Auxiliary Fan
Given the complex and unique nature of baseboard layouts, and the special chassis required to
support them, thermal performance may vary greatly with each baseboard/chassis combination.
Baseboard manufacturers must evaluate and recommend effective thermal solutions for their
specific designs, particularly designs that are proprietary or have nonstandard layouts. Such
thermal solutions must take all system components into account. The power requirements of all
processors that will be supported by the baseboard should be accommodated. The boxed Pentium
support them, thermal performance may vary greatly with each baseboard/chassis combination.
Baseboard manufacturers must evaluate and recommend effective thermal solutions for their
specific designs, particularly designs that are proprietary or have nonstandard layouts. Such
thermal solutions must take all system components into account. The power requirements of all
processors that will be supported by the baseboard should be accommodated. The boxed Pentium
III
Xeon processor is designed to provide a flexible cooling solution, including the option to attach
an auxiliary fan. Should the system thermal evaluation warrant the requirement for an auxiliary
fan, an auxiliary fan must be included with the baseboard to allow the thermal requirements of the
system to be met.
fan, an auxiliary fan must be included with the baseboard to allow the thermal requirements of the
system to be met.
8.0
Integration Tools
The integration tool set for the Pentium
III
Xeon processor system designs will include an In-Target
Probe (ITP) for program execution control, register/memory/IO access, and breakpoint control.
This tool provides functionality commonly associated with debuggers and emulators. An ITP uses
the on-chip debug features of the Pentium
This tool provides functionality commonly associated with debuggers and emulators. An ITP uses
the on-chip debug features of the Pentium
III
Xeon processor to provide program execution control.
Use of an ITP will not affect the high speed operations of the processor signals, ensuring the
system can operate at full speed with an ITP attached.
system can operate at full speed with an ITP attached.
This document describes an ITP as well as a number of technical issues that must be taken into
account when including an ITP and logic analyzer interconnect tools in a debug strategy. The tool
descriptions that follow are meant to be nonexclusive and refer to the internal Intel ITP tool as well
as third party vendor ITP tools. Thus, the tools mentioned should not be considered as Intel's tools,
but as debug tools in the generic sense.
account when including an ITP and logic analyzer interconnect tools in a debug strategy. The tool
descriptions that follow are meant to be nonexclusive and refer to the internal Intel ITP tool as well
as third party vendor ITP tools. Thus, the tools mentioned should not be considered as Intel's tools,
but as debug tools in the generic sense.
In general, the information in this chapter may be used as a basis for including integration tools in
any Pentium
any Pentium
III
Xeon processor-based system designs. The logic analyzer interconnect tool keep-
out zones described in this chapter should be used as general guidelines for Pentium
III
Xeon
processor system designs.
8.1
In-Target Probe (ITP) for Pentium
®
III Xeon™ Processors
An In-Target Probe (ITP) for Pentium
III
Xeon processor is a debug tool which allows access to on-
chip debug features via a small port on the system board called the debug port. An ITP
communicates to the processor through the debug port using a combination of hardware and
software. The software is Windows NT 4.0 running on a host PC. The hardware consists of a PCI
board in the host PC connected to the signals which make up the Pentium
communicates to the processor through the debug port using a combination of hardware and
software. The software is Windows NT 4.0 running on a host PC. The hardware consists of a PCI
board in the host PC connected to the signals which make up the Pentium
III
Xeon processor's
Table 43. Fan/Heatsink Power and Signal Specifications
Description
Min
Typ
Max
+12 V: 12 volt fan power supply
7 V
12 V
13. 8V
IC: Fan current draw
100 mA
SENSE: SENSE frequency (baseboard should pull this pin up to
appropriate V
appropriate V
CC
with resistor (typically 12 k
Ω
)
2 pulses per fan
revolution