f75377 Feature Integration Technology Inc., f75377 Datasheet - Page 44

• Manufacturer Part Number: f75377
• Description: Monitor With Automatic Speed Control
• Manufacturer: Feature Integration Technology Inc.

7-0
7-0
7-0
Bit
Bit
Bit
Bit
7.69
7.70
7.71
7.72
FAN T1 Control Register 5 – Index DAh
FAN T1 Control Register 6 – Index DCh
FAN T1 Control Register 7 – Index DDh
FAN T1 Control Register 8 – Index DEh
BOUND2TEMP
SEC1SPEED
SEC2SPEED
Name
Name
Name
Name
R/W Default
R/W
R/W Default
R/W
R/W Default
R/W
R/W Default
(100%)
(40’C)
(85%)
FFh
28h
d9h
The 2
When temperature is exceed this boundary, FAN1 expect value will load
from segment 2 register (index DDh).
When temperature is below this boundary – hysteresis, FAN expect value
will load from segment 3 register (index DEh).
The meaning of this register is depending on the FAN_MODE(CR96)
2’b00: The value that set in this byte is the relative expect fan speed % of
the full speed in this temperature section.
Ex:
100%:full speed: User must set this register to 0.
2’b01: The value that set in this byte is mean the expect PWM duty-cycle
in this temperature section.
The meaning of this register is depending on the FAN_MODE(CR96)
2’b00: The value that set in this byte is the relative expect fan speed % of
the full speed in this temperature section.
2’b01: The value that set in this byte is mean the expect PWM duty-cycle
in this temperature section.
60% full speed: (100-60)*32/60, so user must program 21 to this reg.
X% full speed: The value programming in this byte is
Expect
st
BOUNDARY temperature for T1 in temperature mode.
44
speed
=



32
+
32
value

× 

Description
Description
Description
Description
Full
speeed
(100-X)*32/X
F75377
March.
V0.12P
, 2008