O'Reilly logo

The Unabridged Pentium 4 IA32 Processor Genealogy by Bob Colwell, Tom Shanley

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Enhanced Power Management Characteristics

Background

For background on the power conservation states available in earlier IA32 processors (including the Pentium® 4), refer to “Pentium® II Power Management Features” on page 683.

Entry to the Deep Sleep State

On the Pentium® 4 and earlier processors, the Deep Sleep state is entered (from the Sleep state) if the chipset causes the system board clock generator to turn off the BCLK to the processor (see Figure 58-1 on page 1431).

Figure 58-1. Power Conservation States Flowchart in a Pentium® 4 Processor

Refer to Figure 58-2 on page 1432. The chipset can transition the Pentium® ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required