f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 37

• Manufacturer Part Number: f75387
• Description: ?1o C Accuracy H/w Monitor Ic With Automatic Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

Power-on default [7:0] =FFh
Power-on default [7:0] =D9h
Power-on default [7:0] =B2h
Power-on default [7:0] =99h
Bit
Bit
Bit
Bit
7-0
7-0
7-0
7-0
8.45. FAN1 SEGMENT 1 SPEED COUNT – Index A4h
8.46. FAN1 SEGMENT 2 SPEED COUNT – Index A5h
8.47. FAN1 SEGMENT 3 SPEED COUNT
8.48. FAN1 SEGMENT 4 SPEED COUNT
SEC1SPEED1
SEC2SPEED1
SEC3SPEED1
SEC4SPEED1
Name
Name
Name
Name
Attribute
Attribute
Attribute
Attribute
R/W
R/W
R/W
R/W
The meaning of this register is depending on the FAN1_MODE[2]:
0: the value x 16 is the fan speed count in this range.
1: the value is PWM duty-cycle (In DAC mode, the output voltage is
VCC*(SEC3SPEED1)/255) in this range.
The meaning of this register is depending on the FAN1_MODE[2]:
register) will be loaded into FAN1 expected count registers (index
74h,75h). When VT1 temperature is below this boundary, FAN1 segment
5 speed count registers(index A9h x 16 or A9h depending on the
FAN1_MODE[2] register) will be loaded into FAN1 expected count
registers (index 74h,75h).
The meaning of this register is depending on the FAN1_MODE[2]:
0: the value x 16 is the fan speed count in this range.
1: the value is PWM duty-cycle (In DAC mode, the output voltage is
VCC*(SEC1SPEED1)/255) in this range.
The meaning of this register is depending on the FAN1_MODE[2]:
0: the value x 16 is the fan speed count in this range.
1: the value is PWM duty-cycle (In DAC mode, the output voltage is
VCC*(SEC2SPEED1)/255) in this range.
– Index A6h
– Index A7h
35
Description
Description
Description
Description
July, 2007
F75387
0.27P