System and method for automatically detecting a type of a...

Details System and method for automatically detecting a type of a... System and method for automatically detecting a type of a...

2007-12-25

2007-12-25

Hartman, Jr., Ronald (Department: 2121)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Specific application of temperature responsive control system

C702S096000, C702S099000, C702S132000, C361S689000, C361S688000

Reexamination Certificate

active

11308984

ABSTRACT:
An exemplary method for automatically detecting a type of a CPU fan includes: setting a PWM duty cycle of the CPU fan to a value of 100%; obtaining revolutions of the CPU fan at the PWM duty cycle in a fixed time period; calculating an RPM of the CPU fan as a full RPM; setting the PWM duty cycle of the CPU fan to another value below 100%; obtaining the revolutions of the CPU fan in the fixed time period, and calculating the RPM of the CPU fan as a test RPM; determining whether the test RPM is less than the full RPM; identifying the type of the CPU fan as a four-pin CPU fan if the test RPM is less than the full RPM; and identifying the type of the CPU fan as a three-pin CPU fan if the test RPM is not less than the full RPM.

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