system power 和 device power 有什么区别

Dlanguage 2009-02-04 05:53:31

在看pb文档，电源管理中的system power和device power有什么区别？

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Larry_Liang_cn 2009-02-05

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system power会影响到整个OS和各个驱动，device power只对各自的设备驱动有效。
system power有On，UserIdle，BacklightOff，ScreenOff，Unattended，Resuming，Suspended，ColdReboot，Reboot这几种。
device power有D0，D1 ，D2 ，D3 ，D4五个。当然device也可以只支持这5个状态的一部分。
更详细的建议微软的文档有，还有可以看看\PUBLIC\COMMON\OAK\DRIVERS\PM下的代码。
这里是微软PM部分的代码

This document is a Draft MIPI Specification. MIPI member companies’ rights and obligations apply to this Draft MIPI Specification as defined in the MIPI Membership Agreement and MIPI Bylaws. An updated Frequently Asked Questions (FAQ) document has been prepared by the SPM Working Group for SPMI v2.0 Specification implementers. Also, a SPMI v2.0 Protocol Implementation Conformance Statement (PICS) document has been prepared by the SPM Working Group. The SPMI v2.0 Specification contains the following major changes with respect to SPMIv1.0: • Unified memory map for Slave Device. • Command acknowledgement (ACK/NACK) for Write commands where required. • System behavior upon detection of a parity error in an RCS Device-initiated Command Frame.

SSSC is the fact device whcih is used to compensate the reactive power in power system.

是一篇WSN电源技术的好文章，值得借鉴. Abstract—In order to satisfy the requirement of power quality on-line monitoring system which is always online, cheap price and a wide coverage,the thesis puts forward to methods that GPRS(General Packet Radio Service)communications technology is applied in power quality on-line monitoring system.The main content of the system is that:the combination of DSP and MCU is used in power quality on-line monitoring system to store,display,count and analyze the collected data of voltage and current from each terminal, and communicates with supervisory computer through GPRS communication module to realize power quality monitoring in the grid. According to the need of user,it can control field device to realize the reseach of distributed power quality on-line monitoring System.