W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 40

• 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

Table 6.3-3 Relative Register-at Speed Cruise Mode of Smart Fan I control mode
SMART FAN
Concept
W83627EHF/EHG controls the fan speed so that the temperature could meet the target temperature
set in the BIOS or software.
W83627EHF/EHG support
while Pin120 (CPUFANOUT1) pairs with Pin104 (SYSTIN), Pin103 (CPUTIN), or Pin102 (AUXTIN),
which is defined in Bank0 Index 4Ah.bit7~6.
Figure 6.9, 6.10, and 6.11 illustrate
is described as follows:
(1) Figure 6.9 shows the initial condition of
(2) In the case that currently measured temperature goes beyond (Target Temperature ＋
SYSFANOUT
CPUFANOUT0
AUXFANOUT0
CPUFANOUT1
CRUISE MODE
THERMAL-
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.
SMART FAN
TM
Pin 103
CPUTIN
Pin 104
SYSTIN
Pin 102
AUXTIN
III
CR[05h]
CR[06h]
CR[13h]
CR[63h]
TARGET-SPEED
TM
III
COUNT
mode sets a target temperature through BIOS or application software and
SMART FAN
Only Pin115 (CPUFANOUT0) and Pin120 (CPUFANOUT1) in
SMART FAN
CR[07h]
Bit0-3
CR[07h]
Bir4-7
CR[14h]
Bit0-3
CR[62h]
Bit0-3
TOLERANCE
W83627EHF/EF, W83627EHG/EG
TM
III
SMART FAN
.
Pin115 (CPUFANOUT0) pairs with Pin103 (CPUTIN);
- 34 -
TM
III
mode, and the algorithm of fan speed control
CR[12h]
Bit5
CR[12h]
Bir4
CR[12h]
Bit3
CR[12h]
Bit6
OUTPUT VALUE
KEEP MIN. FAN
TM
Pin 115
CPUFanOut0
Pin 120
CPUFanOut1
III
. Target Temperature, Temperature
CR[0Eh]
DOWN
STEP-
TIME
STEP-UP
CR[0Fh]
TIME