The invention relates to a dynamic
voltage frequency adjustment method in the
power management technology, which comprises steps: collecting different hardware signals; writing a hardware dynamic
voltage frequency adjustment controller and a corresponding register of a CPU loading log; reading CPU loading log information via an
operating system /
software drive, and inputting the information into an interface module of the
operating system /
software drive after analyzing; and reading dynamic
processing temperature compensation, the hardware dynamic
voltage frequency adjustment controller, the information processed by the interface module of the
operating system /
software drive; outputting to a corresponding frequency adjustment and voltage adjustment unit via related
algorithm analysis, so as to complete adjusting
system real time dynamic voltage frequency. The invention adjusts working frequency according to
system performance demands, and correspondingly reduces
system working voltage and reduces
dynamic power dissipation. The invention greatly improves shortcomings of short service life of the battery, bad
system stability and reliability brought in by the traditional simple
power management technology. The invention can use various
embedded system devices such as the portable
multimedia recording and playing device, and
smart phone.