Wireless Intel SpeedStep Power Manager

White PaperWireless Intel SpeedStep ® Power Managerconst UINT32 FreqArray[][3] = {// Core, Mem, LCD62400, 20800, 10400,52000, 20800, 10400,41600, 20800, 10400,31200, 20800, 10400,20800, 20800, 10400,31200, 10400, 5200,15600, 10400, 5200,10400, 10400, 5200};typedef struct _FreqStruct {UINT32 Core;UINT32 Mem;UINT32 Lcd;} FreqStruct;typedef FreqStruct FreqArray [sizeof(BvdFreqArray)/sizeof(UINT32)/(LcdClk+1)];typedef enum {Off,On,LowPower} DevStatesEnum;typedef struct _IPMDeviceInfo {char DeviceId;// Device IdentifierDevStatesEnumDeviceState;// Current State of Device} IPMDeviceInfo;typedef struct _IPMDriverInfo {USHORT DriverHandle;// Id for a registered driverIPMDeviceInfo Devices[8];// Max of 8 deviceschar NumDevices;// indicates #devices managedchar *CallBack; // callback functionDriverFreqSensitivity FreqSensitivity; // 32-bit bitfieldDriverStateSensitvity StateSensitvity; // 32-bit bitfield} IPMDriverInfo;typedef UINT32 DriverFreqSensitivity; // bit field based onFreqArraytypedef UINT32 DriverStateSensitvity; // bit field based onCPUState12.0 SummaryFirst available in the Intel PXA27x processor family, Wireless IntelSpeedStep ® Technology provides the ability to dynamically adjustthe power and performance of the processor based on CPUdemand. This can result in a significant decrease in powerconsumption for wireless handheld devices to increase standbyand talk-time. Wireless Intel SpeedStep Technology advances thecapabilities of functions already built into the Intel XScalemicroarchitecture by incorporating three new low-power statesand using advanced Wireless Intel SpeedStep Power ManagerSoftware to intelligently manage the power and performanceneeds for the end user. The technology is able to change bothvoltage and frequency on-the-fly, saving additional power whilestill providing the necessary performance to run rich applications.For more information, visit the Intel Web site at: developer.intel.comPerformance tests and ratings contained within this document are measured using specific computer systems and/or components and reflect theapproximate performance of Intel ® products as measured by those tests. Any difference in system hardware or software design or configurationmay affect actual performance. Buyers should consult other sources of information to evaluate the performance of systems or components theyare considering purchasing. For more information on performance tests and on the performance of Intel products, referencewww.intel.com/procs/perf/limits.htm or call (U.S.) 1-800-628-8686 or 1-916-356-3104*Other names and brands may be claimed as the property of others.Intel, the Intel logo, and Intel SpeedStep are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and othercountries.Copyright © 2004 Intel Corporation. All rights reserved. 0304/MS/MD/PDF t Please Recycle 300577-001