W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 53

• 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

7.6.3
The W83627UHG supports two S
Cruise
S
and Index 03h.
There are two pairs of temperature sensors and fan outputs in S
figure below.
7.6.3.1
Two 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:
MART
•
•
(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 (e.g., 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 Index12h, bits 5 ~ 4, and the
value itself is specified in Bank0 Index 08h and Index 09h. The fan remains at the stop value for
the period of time defined in Bank0 Index 0Ch and Index 0Dh.
TM
TM
F
SYSTIN and the temperature sensor selected by Bank0 Index 4Ah, bits 7 ~ 5
CPUTIN and the temperature sensor selected by Bank0 Index 49h, bits 2 ~ 0
AN
mode—and S
mode then controls the fan output according to the current temperature. Three conditions
Figure 7-9 FANOUT and Corresponding Temperature Sensors in S
SMART FAN
Thermal Cruise
TM
I features are enabled, fan output starts from the previous setting in Bank0 Index 01h
TM
mode controls the fan speed to keep the temperature in a specified range. First, this
MART
SYSTIN
SYSTIN
CPUTIN
CPUTIN
PECI_Agent1
PECI_Agent1
PECI_Agent2
PECI_Agent2
PECI_Agent3
PECI_Agent3
PECI_Agent4
PECI_Agent4
CPUTIN
CPUTIN
PECI_Agent1
PECI_Agent1
PECI_Agent2
PECI_Agent2
PECI_Agent3
PECI_Agent3
PECI_Agent4
PECI_Agent4
TM
TM
Control
F
Mode
AN
TM
MART
III. Each of these is discussed in the following sections. When
F
AN
TM
I features—Thermal Cruise
-42-
Pin 92
Pin 92
SYSFANOUT
SYSFANOUT
Pin 90
Pin 90
CPUFANOUT
CPUFANOUT
MART
TM
mode:
F
AN
TM
TM
MART
W83627UHG
mode and Fan Speed
I, as illustrated in the
F
AN
TM
I