Apparatus and method for automatic cpu speed control

G - Physics – 06 – F

Patent

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G06F 1/32 (2006.01)

Patent

CA 2355335

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.

L'invention concerne un système de commande d'unité centrale (UC) destiné à s'utiliser dans des dispositifs comprenant des microprocesseurs ou micro-organes de commande pouvant également être alimentés par batterie. Le système comprend un synthétiseur de fréquences programmable destiné à fournir à l'UC et aux autres bus système dans le dispositif une fréquence d'horloge variable sur la base de l'exécution de l'application ou de l'interruption par le dispositif. La sortie du synthétiseur de fréquences peut varier de façon dynamique en fonction d'une application ou d'une tâche particulière devant être exécutée par le dispositif ou sur la base de l'utilisation totale de l'UC. Le système d'exploitation du dispositif et l'UC sont tous deux capables de commander la sortie du synthétiseur de fréquences pour garantir que l'UC fonctionne à son niveau d'efficacité de puissance maximal.

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