f75375 Feature Integration Technology Inc., f75375 Datasheet - Page 18

• Manufacturer Part Number: f75375
• Description: Fintek Hardware Monitor Ic Datasheet
• Manufacturer: Feature Integration Technology Inc.

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).
(2). After the period of detecting fan full speed, when PWM_Duty > (RAISE_Duty + 5), and current fan count is monitored FFFFh.
6.4 SMI#
6.4.1 Temperature
When PWM_Duty reaches FFh, the fan speed count can’t reach the fan expected count in time. (Figure 5-12)
SMI# interrupt for temperature is shown as figure 5-13. Temperature exceeding high limit or going below hystersis will
cause an interrupt if the previous interrupt has been reset by writing “1” all the interrupt Status Register.
Fintek
Expected Fan Count
Current Fan Count
Duty-cycle
Fan_Fault#
SMI#
(level mode
active low)
(pulse mode)
T
100%
To
HYST
*Interrupt Reset when Interrupt Status Registers are written 1
Figure 5-13
12
*
3 min(default)
*
Figure 5-12
Feature Integration Technology Inc.
*
*
F75375S/F75375SG
July 2007
V0.26P