W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 41

• Manufacturer Part Number: W83627EHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(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
(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
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 ＋ Temperature
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.
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
InitialOut
.
FanOutput
put
Steps
Step
−
Min
−
InitialOut
.
FanOutput
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
- 35 -
Publication Release Date: Nov. 2006
Revision 1.3
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