Binary Information Press
To extend the service life of battery-powered portable devices while meeting performance requirements, reducing the power consumption has become a major concern. A design of military handheld calculator based on TMS320VC5509A was introduced. The realization of low power by cooperation with hardware and software of all aspects was described in detail, such as choices of devices, dynamic voltage and frequency scaling, management of power supply and memory. Then dynamic power management model for the system was established and time-out polices was implemented further.