f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 38

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

INDEX B0 -- BD registers – FAN2 CONTROL v.s. TEMPERATURE 2
Power-on default [7:0] =80h
Power-on default [7:0] =46h
Power-on default [7:0] =3Ch
Bit
6-0
Bit
Bit
7-0
6-0
7
8.49. FAN1 SEGMENT 5 SPEED COUNT
8.50. VT2 BOUNDARY 1 TEMPERATURE – Index B0h
8.51. VT2 BOUNDARY 2 TEMPERATURE – Index B1h
7
BOUND1TMP2
BOUND2TMP2
SEC5SPEED1
Reserved
Reserved
Name
Name
Name
Attribute
Attribute
R/W
R/W
R/W
-
-
R/W
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*(SEC4SPEED1)/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*(SEC5SPEED1)/255) in this range.
Return 0 when read.
The 1
When VT2 temperature exceeds this boundary, FAN2 segment 1 speed
count register (index B4h x 16 or index B4h depending on the
FAN2_MODE[2] register) will be loaded into FAN2 expected count registers
(index 84h, 85h).
When VT2 temperature is below this boundary – hysteresis, FAN2 segment
2 speed count register (index B5h x 16 or index B5h depending on the
FAN2_MODE[2] register) will be loaded into FAN2 expected count register
(index 84h, 85h).
Return 0 when read.
The 2
When VT2 temperature exceeds this boundary, FAN2 segment 2 speed
count register (index B5h x 16 or index B6h depending on the
st
nd
BOUNDARY temperature for VT2 in temperature mode.
– Index A8h
BOUNDARY temperature for VT2 in temperature mode.
36
Description
Description
Description
July, 2007
F75387
0.27P