Method and apparatus to dynamically change an operating frequency and operating voltage of an electronic device

A system, comprising:

• an electronic device;
• a memory coupled to the electronic device by a bus;
• a first unit to determine a target operating point for the electronic device, the target operating point including a target operating frequency and a target operating voltage;
• and
• a second unit to dynamically change a current operating point for the electronic device including a current operating frequency and a current operating voltage by non-contemporaneously changing the current operating frequency to the target operating frequency and a current operating voltage to the target operating voltage, wherein during the changing the electronic device is in an active state and during changing the current operating frequency an electronic device bus coupled to a processing device is stalled, a first clock for the electronic device is stopped, and a phase locked loop circuit for the core clock is set to the target operating frequency.