w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 41

• Manufacturer Part Number: w83627ehf
• Description: W83627ehf/ef W83627ehg/eg Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

SMART FAN
Concept
W83627EHF/EHG controls the fan speed so that the temperature could meet the target temperature
set in the BIOS or software.
W83627EHF/EHG support
while Pin120 (CPUFANOUT1) pairs with Pin104 (SYSTIN), Pin103 (CPUTIN), or Pin102 (AUXTIN),
which is defined in Bank0 Index 4Ah.bit7~6.
Figure 6.9, 6.10, and 6.11 illustrate
is described as follows:
(1) Figure 6.9 shows the initial condition of
(2) In the case that currently measured temperature goes beyond (Target Temperature
(3) Meanwhile, original Target Temperature dynamically shifts to (Target Temperature
(4) If the currently measured temperature is within the (Target Temperature 1 ± Temperature
(5) The fan-speed-up and Target Temperature comparison-then-shift process continue until currently
Tolerance, Maximum Fan Output and Minimum Fan Output must be set first. If the currently
measured temperature is within the (Target Temperature ± Temperature Tolerance), the fan
speed remains constant.
Temperature Tolerance), which is shown in Figure 6.10, fan speed jumps up to the next step.
“Step” here refers to the value in the CPUFANOUT Output Value Select Register, Bank0 Index03h
or Index61h.
Temperature Tolerance), and new Target Temperature, named Target Temperature 1, is formed.
In other words, Target Temperature 1 equals original Target Temperature plus Temperature
Tolerance.
Tolerance) then, the fan speed remains constant. Otherwise, fan speed jumps up to the next step
again. Target Temperature then dynamically shifts to (Target Temperature 1
Tolerance), and new Target Temperature again, named Target Temperature 2, is formed.
measured temperature locates within (Target Temperature X ± Temperature Tolerance), or fan
output speed reaches its maximum speed.
SMART FAN
TM
III
Pin 103
CPUTIN
Pin 104
SYSTIN
Pin 102
AUXTIN
TM
III
mode sets a target temperature through BIOS or application software and
SMART FAN
Only Pin115 (CPUFANOUT0) and Pin120 (CPUFANOUT1) in
SMART FAN
W83627EHF/EF, W83627EHG/EG
TM
III
SMART FAN
.
Pin115 (CPUFANOUT0) pairs with Pin103 (CPUTIN);
-35-
TM
III
mode, and the algorithm of fan speed control
Pin 115
CPUFanOut0
Pin 120
CPUFanOut1
TM
Publication Release Date: January 18, 2006
III
. Target Temperature, Temperature
Temperature
Revision 1.0