W83791G Datasheet, PDF (58/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
FAN 1/2 Configuration Register ⎯ Index 84h (Bank 0), continued.
BIT
NAME
ATTRIBUTE
DESCRIPTION
3-2 FAN1_TYPE R/W
FAN 1 PWM Control Type.
00 - Manual PWM Control, which is automatic PWM.
(Default)
01 - Thermal Cruise mode.
10 - Fan Speed Cruise Mode.
11 - Reserved.
1
FAN2_OB
R/W
Enable Fan 2 as Output Buffer. Set to 1, FANPWM2 can
drive logical high or logical low. Default Pin 11 (PWMOUT2)
is open-drain.
0
FAN1_OB
R/W
Enable Fan 1 as Output Buffer. Set to 1, FANPWM1 can
drive logical high or logical low. Default Pin 10 (PWMOUT1)
is open-drain.
7.56 Fan 1 Target Temperature Register/Target Fan 1 Speed Control Register ⎯
Index 85h (Bank 0)
Power on default: 00h
VTIN1 target temperature register for Thermal Cruise mode.
BIT
NAME
ATTRIBUTE
DESCRIPTION
7 Reserved
Reserved.
6-0 FAN_TAR_T1[6:0]
R/W
Fan 1 Target Temperature. Only for Thermal Cruise
mode. When the temperature 1 over the target
temperature add tolerance temperature, the smart fan
1 duty cycle will up count until the duty cycle obtain to
FFh.
Fan 1 target speed register for Fan Speed Cruise mode.
BIT
NAME
ATTRIBUTE
DESCRIPTION
7-0 FAN_TAR_CNT1
[7:0]
R/W
Target Fan 1 Speed Control. Only for Fan Speed
Cruise Mode. When the fan 1 monitored Fan 1 Count
over the target Fan Count add tolerance, the fan duty
cycle will up/down count until the duty cycle have been
corresponding the monitored speed count.
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Publication Release Date: April 14, 2006
Revision 1.1