Intel ® Pentium ® M Processor Logic Analyzer Support; Overview; Implementation; Logic Analyzer Interface (Lai) - Intel Pentium M Processor Design Manual

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Intel Pentium M Processor and Intel
Debug Port and Logic Analyzer Interface
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10.3 Intel
Support
10.3.1

Overview

A second key tool that is necessary to debug BIOS, logic, signal integrity, general software, and
general hardware issues involving CPUs, chipsets, SIOs, PCI devices, and other hardware in
platform design is the Intel Pentium M processor system bus logic analyzer probe. This tool is
widely used by various validation, test, and debug groups from third party BIOS vendors, OEMs,
and other developers).
There are two primary requirements for providing LAI support:
1. Providing a motherboard with a compatible CPU socket. The Intel Pentium M processor
system bus logic analyzer probe is an interposer that plugs into the CPU socket, and the CPU
then plugs into the LAI. The use of non-standard sockets may also prohibit the logic analyzer
probe from working as the locking mechanism may become inaccessible. It is important to
check the logic analyzer probe design guidelines to ensure a particular socket may work. Note
that the logic analyzer probe was designed to accommodate the most common Intel Pentium M
processor sockets on the market.
2. Observing Intel Pentium M processor system bus logic analyzer probe keepout requirements.
There are several options to achieving this. Removing the motherboard from the case is
typically the first step to meeting keepout requirements. When keepouts still cannot be met,
Intel strongly recommends building a separate debug motherboard that has the same bill of
material (BOM) and netlist, but with Intel Pentium M processor system bus logic analyzer
probe keepout requirements met (this also provides the opportunity to add other test-points).
10.3.2

Implementation

Agilent Technologies* can provide details on the Intel Pentium M processor system bus logic
analyzer probe mechanicals (i.e., design guide with keepout info).
10.4

Logic Analyzer Interface (LAI)

Contact LAI vendors to obtain specific information about their LAIs. The following information is
general in nature.
Due to the complexity of an Intel Pentium M processor-based system, the LAI is critical in
providing the ability to probe and capture Intel Pentium M processor system bus signals. There are
two sets of considerations to keep in mind when designing an Intel Pentium M processor-based
system that may make use of an LAI:
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Mechanical
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Electrical
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E7501 Chipset Platform
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Pentium M Processor Logic Analyzer
Design Guide