f75377 Feature Integration Technology Inc., f75377 Datasheet - Page 54
f75377
Manufacturer Part Number
f75377
Description
Monitor With Automatic Speed Control
Manufacturer
Feature Integration Technology Inc.
Datasheet
1.F75377.pdf
(66 pages)
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7-0
7-0
7-0
Bit
Bit
Bit
Bit
7.100 FAN T5 Control Register 4 – Index D9h
7.101 FAN T5 Control Register 5 – Index DAh
7.102 FAN T5 Control Register 6 – Index DCh
7.103 FAN T5 Control Register 7 – Index DDh
BOUND1TEMP
BOUND2TEMP
SEC1SPEED
Name
Name
Name
Name
R/W Default
R/W
R/W Default
R/W
R/W Default
R/W
R/W Default
(100%)
(70’C)
(40’C)
FFh
46h
28h
The 1
When temperature is exceed this boundary, FAN expect value will load
from segment 1 register (index DC)h.
When temperature is below this boundary – hysteresis, FAN expect value
will load from segment 2 register (index DDh).
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.
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
st
BOUNDARY temperature for T5 in temperature mode.
BOUNDARY temperature for T5 in temperature mode.
54
speed
=
32
+
32
value
×
Description
Description
Description
Description
Full
speeed
(100-X)*32/X
F75377
March.
V0.12P
, 2008
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