W83627EG Nuvoton Technology Corporation of America, W83627EG Datasheet - Page 60

• Manufacturer Part Number: W83627EG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EG

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

(1) Figure 7.9 shows the initial condition of SMART FAN
(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
(6)
(7) In the case that currently measured temperature goes below (Target Temperature －
(8) Meanwhile, original Target Temperature dynamically shifts to (Target Temperature －
(9) If the currently measured temperature is within the (Target Temperature 1 ± Temperature
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 7.10, 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 7.10 must be an integer.
Temperature Tolerance), which is shown in Figure 7.11, 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.
Max
.
FanOutput
Steps
−
InitialOut
put
must be an integer; otherwise, it may lead to register overflow.
W83627EHF/EF, W83627EHG/EG
-49-
TM
III. Target Temperature, Temperature
Publication Release Date: April 7, 2009
In other words,
Version 1.94