W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 58

• Manufacturer Part Number: W83627DHG-PT
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG-PT

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

8.6.3.1. Thermal Cruise
Four pairs of temperature sensors and fan outputs in Thermal Cruise
Thermal Cruise
range is defined in BIOS by a temperature and the interval (e.g., 55 °C ± 3 °C). As long as the current
temperature remains below the low end of this range (i.e., 52 °C), the fan is off. Once the temperature
exceeds the low end, the fan turns on at a speed defined in BIOS (e.g., 20% output). Thermal
Cruise
may occur:
In general, Thermal Cruise
The following figures illustrate two examples of Thermal Cruise
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•
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(1) If the temperature still exceeds the high end, fan output increases slowly. If the fan is operating
at full speed but the temperature still exceeds the high end, a warning message is issued to
protect the system.
(2) If the temperature falls below the high end (i.e., 58 °C) but remains above the low end (e.g., 52
°C), fan output remains the same.
(3) If the temperature falls below the low end (e.g., 52 °C), fan output decreases slowly to zero or
to a specified “stop value”. This stop value is enabled by Bank0 Index 12h, bits 3 ~ 5, and the
value itself is specified in Bank0 Index 08h, Index 09h, Index 15h, and Index 64h. The fan remains
at the stop value for the period of time defined in Bank0 Index 0Ch, Index 0Dh, Index 17h, and
Index 66h.
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TM
SYSTIN and SYSFANOUT
CPUFANOUT0 and the temperature sensor selected by Bank0 Index 49h, bits 2 ~ 0
AUXFANOUT and the temperature sensor selected by Bank0 Index 49h, bits 6 ~ 4
CPUFANOUT1 and the temperature sensor selected by Bank0 Index 4Ah, bits 7 ~ 5
if the current temperature is higher than the high end, increase the fan speed;
if the current temperature is lower than the low end, decrease the fan speed;
otherwise, keep the fan speed the same.
mode then controls the fan output according to the current temperature. Three conditions
TM
mode controls the fan speed to keep the temperature in a specified range. First, this
TM
TM
Mode
mode means
W83627DHG-P/W83627DHG-PT
-48-
TM
mode.
Publication Release Date: July 09, 2009
TM
mode:
Version 1.94