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參數(shù)資料
| 型號(hào)： | 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(tái)設(shè)計(jì)指南應(yīng)用筆記的AMD PowerNow！技術(shù)白皮書(shū) |
| 文件頁(yè)數(shù)： | 10/18頁(yè) |
| 文件大?。?/td> | 392K |
| 代理商： | 24404A |
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6
Software Control
AMD PowerNow! Technology Dynamically Manages Power and Performance
24404A/0—November 2000
Preliminary Information
Software Control
For embedded applications, software to support
AMD PowerNow! technology can be implemented in one of two
ways.
I
For real-time operating systems (RTOS), like embedded
Linux, AMD PowerNow! technology is supported in the
operating system or BIOS.
For
Microsoft
operating
technology is supported through a publicly available driver.
I
systems,
AMD PowerNow!
It is the driver, OS, or BIOS that places the processor in the
EPM Stop Grant State and invokes desired changes.
Software control allows AMD PowerNow! technology to be
easily implemented, even for short design cycles. The only
unique software required from the system designer is software
that:
I
Implements Automatic mode
Determines what factors should drive a frequency or voltage
transition
I
In some cases, this may be as simple as tracking CPU activity to
step frequency and voltage up and down in accordance with
demand. In this case, the designer would need to incorporate
the CPU monitoring into the application environment so that
AMD PowerNow! technology state transitions are only invoked
under desired conditions.
The modifications for actually altering voltage and frequency
take place in EPM Stop Grant State and are handled
transparently.
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