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| 型號： | 24404A |
| 英文描述： | AMD PowerNow!? Technology Platform Design Guide Application Note AMD PowerNow! Technology White Paper |
| 中文描述： | AMD的PowerNow?。考夹g(shù)平臺設(shè)計指南應(yīng)用筆記的AMD PowerNow！技術(shù)白皮書 |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 392K |
| 代理商： | 24404A |
4
Implementing AMD PowerNow! Technology
AMD PowerNow! Technology Dynamically Manages Power and Performance
24404A/0—November 2000
Preliminary Information
Implementing AMD PowerNow! Technology
AMD PowerNow! technology is available on all low-power
AMD-K6-2E+ and AMD-K6-III
E+ processors. AMD’s newly-
released second-generation power-saving technology is easily
accessed and controlled through the Enhanced Power
Management (EPM) 16-byte I/O block.
I
The
Enhanced Power Management Register (EPMR)
is a
model-specific register (MSR). It is used to map and enable
access to the
EPM 16-byte I/O block
.
1
By modifying the EPM block, the operating system (OS) can
change the voltage and bus frequency multiplier settings
2
.
I
As shown in Figure 1, the external VID[4:0] pins can be routed
to an external programmable voltage regulator to modify the
V
CC2
core voltage.
Figure 1. AMD-K6-2E+ or AMD-K6-
III
E+ Processor with
AMD PowerNow! Technology Signals
1.
See the
Embedded AMD-K6 Processors BIOS Design Guide
Application Note
, order# 23913, and the
AMD PowerNow! Technology
Platform Design Guide for Embedded Processors Application Note
,
order# 24267, for more information about the EPMR and the EPM I/O
block.
Bus frequency pins need not be modified. The internal processor frequency is
updated by altering the internal processor clock and not the external bus
frequency.
2.
Enhanced Power Management
Register (EPMR)
Frequency Multiplier and
Voltage Regulator Control
VID/BF Pin Logic
AMD-K6-2E+ or AMD-K6-
III
E+
Embedded Processor
Enhanced AMD-K6 CPU
in 0.18
m
process with
AMD PowerNow!
Technology
BF[2:0]
VID[4:0]
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