W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 57

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

If the current temperature rises higher than (Target Temperature 1 + Temperature Tolerance), the fan
speed rises one step again, and the target temperature shifts to (Target Temperature 1 + Temperature
Tolerance), or Target Temperature 2. This process repeats whenever the current temperature is
higher than (Target Temperature X ± Temperature Tolerance) or until the fan speed reaches its
maximum speed.
(4) If the current temperature falls below (Target Temperature － Temperature Tolerance), the fan
If the current temperature falls lower than (Target Temperature 1 － Temperature Tolerance), the fan
speed is reduced one step again, and the target temperature shifts to (Target Temperature 1 －
Temperature Tolerance), or Target Temperature 2. This process repeats whenever the current
temperature is lower than (Target Temperature X － Temperature Tolerance) or until the fan speed
reaches its minimum speed.
(5) If the current temperature is always lower than (Target Temperature X － Temperature Tolerance),
The following tables show the current temperature, fan output value and the relative control registers
at S
MART
speed falls one step. The step is the value in the CPUFANOUT Output Value Select Register,
Bank0, Index 03h. In addition, the target temperature shifts to (Target Temperature －
Temperature Tolerance), creating a new target temperature named Target Temperature 1.This is
illustrated in the figure below.
the fan speed decreases slowly to zero or to a specified stop value. The stop value is enabled by
register Bank0, 12h, bit 4 and the stop value is specified in Bank0, Index 09h. The fan remains at
the stop value for the period of time defined in Bank0, Index 0Dh.
Step
Step
Max. Fan Output
Max. Fan Output
Min. Fan Output
Min. Fan Output
(DC / PWM)
(DC / PWM)
Fan output
Fan output
Output Value
Output Value
F
Figure 7-16 S
Fan Initial
Fan Initial
AN
TM
III mode.
Current Temp. < Target Temp. -
Current Temp. < Target Temp. - Tol .
MART
F
AN
Tar 3
Tar 3
TM
Tolerance
Tolerance
III Mechanism (Current Temp. < Target Temp. – Tol.)
Tar 2
Tar 2
Tar 1
Tar 1
Tar
Tar
-42-
Publication Release Date: March 24, 2008
Tol .
W83627UHG
Temperature
Temperature
Revision 1.44