W83793G Datasheet, PDF (73/131 Pages) Winbond – Winbond H/W Monitor

W83793G
8.11.2.11 SmartFan Control Mode Select Register (FanCtrlMode)
There are two SmartFan modes supported with W83793G once SmartFan function enabled (Please
refer TempFanSelect to enable SmartFan Function), they are Thermal Cruise mode and SmartFan II
mode. While reset it is cleared (00_HEX), SmartFan II mode.
Location : FanCtrlMode - Bank 2 Address 07_HEX
Type : Read / Write
Reset :
VSB5V(Pin 7) Rising,
Init Reset(CR40.Bit7) is set,
VDD5V(Pin 25) Rising @ RST_VDD_MD(CR40.Bit4) set,
SYSRSTIN_N(Pin 15) Falling @ SYSRST_MD(CR40.Bit5) set.
BIT
Name
Reset
7
6
Reserved
0
0
FANCTRLMODE
5
4
3
TR2_MD TR1_MD TD4_MD
0
0
0
2
TD3_MD
0
1
TD2_MD
0
0
TD1_MD
0
BIT
7-6
5
4
3
2
1
0
DESCRIPTION
Reserved.
TR2_MD (Thermistor 2 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
TR1_MD (Thermistor 1 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
TD4_MD (Thermal Diode 4 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
TD3_MD (Thermal Diode 3 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
TD2_MD (Thermal Diode 2 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
TD1_MD (Thermal Diode 1 SmartFan Control Mode)
0: SmartFan II mode.
1: Thermal Cruise mode.
8.11.2.12 Hysteresis Tolerance of Temperature Register(TolTemp)
In SmartFan mode, to avoid temperature unstable causing fan throttling, W83793G uses a hysteresis
temperature to separate the speed up/slow down temperature point. While reset it is set to 2℃(22_HEX).
Location :
- 69 -
Publication Release Date: Dec. 11, 2006
Revision 1.0