F71869A
EX: Ta = T1, Tb = 60, Ctu = 1, Ctd = 1/4
5.2.12. FAN_FAULT#
Fan_Fault# will be asserted when the fan speed doesn’t meet the expected fan speed
within a programmable period (default is 11 seconds) or when fan stops with respect to
PWM duty-cycle which should be able to turn on the fan. There are two conditions may
cause the FAN_FAULT# event.
(1). When PWM_Duty reaches 0xFF, the fan speed count can’t reach the fan expected
count in time.
11 sec(default)
Current Fan Count
Expected Fan Count
100%
Duty-cycle
Fan_Fault#
Figure 12 FAN_FAULT# event
35
Oct., 2011
V0.19P