Patent Number: 6,298,448

Title: Apparatus and method for automatic CPU speed control based on application-specific criteria

Abstract: A CPU speed control system for use in devices having microprocessors or microcontrollers which may also be operated using battery power. The system includes a programmable frequency synthesizer for providing the CPU and other system buses in the device with a variable clocking frequency based on the application or interrupt being executed by the device. The frequency synthesizer output may be dynamically varied according to a particular application or task that is to be executed by the device or based on total CPU usage. The operating system of the device and the CPU are both capable of controlling the frequency synthesizer output to ensure that the CPU is operating at the most power efficient level possible.

Inventors: Shaffer; Shmuel (Palo Alto, CA), Beyda; William J. (Cupertino, CA), Gold; Cheryl (Palo Alto, CA)

Assignee: Siemens Information and Communication Networks, Inc.

International Classification: G06F 1/32 (20060101); G06F 001/32 ()

Expiration Date: 10/02/2018