AMD AMD-K6-2/400 User Guide - Page 165
AMD PowerNow!™ Technology, 6.1 Enhanced Power Management Features
View all AMD AMD-K6-2/400 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 165 highlights
23542A/0-September 2000 Preliminary Information AMD-K6™-2E+ Embedded Processor Data Sheet 6 AMD PowerNow!™ Technology The AMD PowerNow!™ technology is an advanced secondgeneration power management feature that reduces the overall power consumed by the processor through control of voltage and frequency. This power saving technology is designed to be dynamic and flexible by enabling instant "on-the-fly" and independent control of both the processor's core voltage and frequency. AMD PowerNow! technology can be used in conjunction with the existing power management schemes in an embedded system to provide a better combination of performance and power savings than previously possible. 6.1 Enhanced Power Management Features AMD PowerNow! technology-enabled processors include two new features specifically designed to enhance power management functionality: s Dynamic core frequency control s Dynamic core voltage control These enhanced power management features are accessed and controlled through an I/O block and two registers: s An aligned 16-byte block of I/O address space is defined by the Enhanced Power Management Register (EPMR). s The Enhanced Power Management Register (EPMR) is supported on low-power versions of the processor only. s The Processor State Observability Register (PSOR) is defined differently on the low-power versions of the AMD-K6-2E+ processor to support AMD PowerNow! technology features. The EPMR and PSOR registers and the I/O block are defined in this section, followed by a discussion of how to implement and use the AMD PowerNow! technology features (see "Dynamic Core Frequency and Core Voltage Control" on page 150). The Embedded AMD-K6™ Processors BIOS Design Guide Application Note, order# 23913, contains additional information. Chapter 6 AMD PowerNow!™ Technology 143