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BMC Features to look for...<br />

FAN monitoring & control<br />

<strong>Intel</strong><br />

Developer<br />

Forum<br />

Spring 2001<br />

• Timers or Counters for Tach FAN Speed<br />

monitoring<br />

– Tach FAN speed can be accumulated using a<br />

single counter with a digital multiplexer<br />

– FAN speed is calculated by accumulating counts per<br />

unit time, e.g. 1 second.<br />

– Time to accumulate FAN speeds scales with number of<br />

FANs. I.e. monitoring 8 fans takes 8 seconds.<br />

• Pulse-width Modulator (PWM) or D/A<br />

outputs for FAN Speed control<br />

Copyright © 2001 <strong>Intel</strong> Corporation.<br />

Page 21

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