W83793G Datasheet, PDF (59/131 Pages) Winbond – Winbond H/W Monitor

W83793G
The concept is quite simple, when temperature is larger(not include equal) than
TargetTemp+TolTemp, Fan will speed up; When temperature is less(not include equal) than
TargetTemp-TolTemp, Fan will slow down; Otherwise, Fan keeps its current speed.
8.11.1.4 Smart Fan II Control registers(Bank 2)
MNEMONIC
REGISTER NAME
TYPE
TD1Level01.
TR2Level67.
Smart Fan II Fan Transition temperature levels
RW
TD1FanLevel0.
Smart Fan II Fan Output Levels
RW
TR2FanLevel6.
Smart Fan II algorithm provides user a mechanism to setup Fan speed via Temperature level
relationship. Each temperature source has a corresponding table, and totally six tables are used to
control Temperature 1(D1) to Temperature 6 (R2).
A table is consisted of 7 temperature levels and 7 fan levels as following.
While Fan speed jump from one level to another level, there is a hysterisis mechanism to prevent fan
from throttling. When speed jump high to another level, temperature need to at specified temperature
level, but instead when speed is slow down, it must wait until temperature is lower than specified
temperature level minus tolerance.
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Publication Release Date: Dec. 11, 2006
Revision 1.0