w83627ef Winbond Electronics Corp America, w83627ef Datasheet - Page 43

• Manufacturer Part Number: w83627ef
• Description: Lpc Super I/o For Desktop & Server
• Manufacturer: Winbond Electronics Corp America

6.5.4
Smart Fan III control system can be disabled and the fan speed control algorithm can be programmed
by BIOS or application software. The programming method must be set fan configuration at bank 0
index 04h,bit5-4,index 12h bit2~1 index 62h bit5~4.Before enabling Smart Fan III mode ,you have to
set relative registers as table 6.4-2. In addition to the required registers, the device has a the following
registers that further configure and enable the fan speed control functionality .Then Table 6.4-1
displayed current temperature and fan output value at Smart Fan III mode , Besides, the table 6.4-2
used to setting at Smart Fan III mode
Current CPU
Temperature
Current SYS
Temperature
Current AUX
Temperature
Current
CPUFANOUT0
Output Value
Current
SYSFANOUT
Output Value
Table 6.4-1 Display Register- at Smart Fan III Mode
DESCRIPTION
Step
Step
Smart Fan III Mode
Max. Fan Output
Max. Fan Output
(DC / PWM)
(DC / PWM)
Min. Fan Output
Min. Fan Output
Fan output
Fan output
Output Value
Output Value
Fan Initial
Fan Initial
Bank1
50H ,51H
Bank 0
27H
Bank2
50H,51H
Bank0
03H
Bank0
01H
Current Temp. < Target Temp. - Tol.
Current Temp. < Target Temp. - Tol.
REGISTER
ADDRESS
Tar 3
Tar 3
Tolerance
Tolerance
CPUTIN Temperature
Sensor
SYSTIN Temperature
Sensor
AUXTIN Temperature
Sensor
CPUFANOUT0 Output
Value Select
SYSFANOUT Output
Value Select
Tar 2
Tar 2
REGISTER NAME
W83627EHF/EF, W83627EHG/EG
Tar 1
Tar 1
Figure 6.11
Tar
Tar
- 37 -
Read only
Read only
Read only
FFh
FFh
ATTRIBUTE
=
=
=
=
Publication Release Date: Nov. 2006
(Initial Value – Min. Fan output)
(Initial Value – Min. Fan output)
Speed-down Slope
Speed-down Slope
Integer
Integer
Step
Step
8 MSB, 1°C bit 7,
0.5 °C
8 MSB, 1°C
8 MSB, 1°C bit 7,
0.5 °C
Bit7-0
CPUFANOUT Value
Bit7-0 SYSFANOUT
Value
Temperature
Temperature
BIT DATA
Revision 1.3