W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 56

• 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

(c) One more protection is provided that Fan output will not be decreased to 0 in the above (3) situation
(d)
7.6.2
There are 4 pairs of Fan input/Fan output control at this mode: SYSFANIN with SYSFANOUT,
CPUFANIN0
CPUFANOUT1. At this mode, W83627EHF/EHG provides the Smart Fan system which can control the
fan speed automatically depend on current fan speed to keep it with in a specific range. A wanted fan
speed count and interval must be set (ex. 160 ± 10 ) by BIOS. As long as the fan speed count is the
specific range, Fan output will keep the current value. If current fan speed count is higher than the high
limit (ex. 160+10), Fan output will be increased to keep the count less than the high limit. Otherwise, if
current fan speed is less than the low limit(ex. 160-10), Fan output will be decreased to keep the count
higher than the low limit. See Figure 7.8 example.
in order to keep the fans running with a minimum speed. By setting Bank0 Index12h.bit3~5 to 1,
Fan output will be decreased to the “Stop Output Value” which are defined at Bank0 Index08h,
Index09h and Index17h.
Fan Speed Cruise mode
with
CPUFANOUT0,
AUXFANIN
W83627EHF/EF, W83627EHG/EG
-45-
Figure 7.7
with
AUXFANOUT
Publication Release Date: April 7, 2009
and
CPUFANIN1
Version 1.94
with