w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 42

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

(6)
(7) In the case that currently measured temperature goes below (Target Temperature
Temperature
(8) Meanwhile, original Target Temperature dynamically shifts to (Target Temperature

(9) If the currently measured temperature is within the (Target Temperature 1 ± Temperature
(10) The fan-slow-down and Target Temperature comparison-then-shift process continue until
(11)
(12) In the case that the temperature is always lower than (Target Temperature X
Temperature
Please be noted that “Speed-up Slope” shown in the Figure 6.10 must be an integer.
words,
Tolerance), which is shown in Figure 6.11, fan speed slows down by one 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 minus Temperature
Tolerance.
Tolerance) then, the fan speed remains constant. Otherwise, fan speed slows down by one step
again. Target Temperature then dynamically shifts to (Target Temperature 1
Temperature
Tolerance), and new Target Temperature again, named Target Temperature 2, is formed.
currently measured temperature locates within (Target Temperature X ± Temperature Tolerance),
or fan output speed hits its minimum speed.
words,
Tolerance), and, for some reason, the fan speed would like to be kept at the minimum speed, Stop
Value, instead of being stopped, set register Bank0 12h.bit 4. Set bit 4 to 1, fan speed will always
keep at the value set in Bank0 Index09h when temperature is always below (Target Temperature
X
Temperature Tolerance). Set bit 4 to 0, fan speed will decrease to 0 after a time period set in
Bank0 Index0Dh.
Please be noted that “Speed-down Slope” shown in the Figure 6.11 must be an integer.
Max. Fan Output
Max. Fan Output
Max. Fan Output
Min. Fan Output
Min. Fan Output
Min. Fan Output
(DC / PWM)
(DC / PWM)
(DC / PWM)
Fan output
Fan output
Fan output
Max
InitialOut
.
FanOutput
put
Steps
Step

Min

InitialOut
.
FanOutput
Tar. - Tol.
Tar. - Tol.
Tar. - Tol.
put
must be an integer; otherwise, it may lead to register overflow.
must be an integer; otherwise, it may lead to register overflow.
W83627EHF/EF, W83627EHG/EG
Setting
Setting
Setting
Figure 6.9
-36-
Tolerance
Tolerance
Tolerance
Tar. + Tol.
Tar. + Tol.
Tar. + Tol.
Temperature
Temperature
In other
In other