Platform Power Delivery Guidelines - Intel Pentium M Processor Design Manual

Platform Power Delivery Guidelines

This chapter provides an example for board power delivery of an Intel
®
Intel E7501 chipset-based platform. There are many methods to implement a power delivery
system, and this is only one example.
A voltage regulator (VR) is used to regulate power to the core and Intel Pentium M processor
system bus rails of the Intel Pentium M processor and the Intel
voltage regulator is required for the Intel
offered in Micro-FCPGA packages for socketable boards and Micro-FCBGA packages for surface
mount boards.
The Intel Pentium M processor supports Enhanced Intel
real-time dynamic switching of the voltage and frequency between multiple performance modes.
This occurs by switching the bus ratios, core operating voltage, and core processor speeds without
resetting the system. With Enhanced Intel SpeedStep technology, there will be more than two
modes of operation. The processor will be able to operate in more than two voltage levels.
Although this specification addresses the highest processor core frequency and the lowest
processor core frequency, there will be other modes where the voltage command may be different
than that of these two modes.
Terminology used to reference the names of the voltage rails are defined below.
•
V
CC_CORE
•
V
CCP
ICH3-S chipset and the CPU ITP700FLEX debug port when used.
Design Guide
®
Intel Pentium
is the core rail of the processor.
is the PSB rail of the processor and MCH, and is also used for CPU signals of the
®
M Processor and Intel
Platform Power Delivery Guidelines
®
®
E7501 chipset core. The Intel Pentium M processor is
®
SpeedStep
®
E7501 Chipset Platform
® ®
Pentium M Processor and
E7501 chipset PSB. A separate
®
technology, which enables
11
187