W83697HG Datasheet, PDF (60/109 Pages) Winbond – WINBOND LPC I/O

W83697HF/ HG
FAN2 Duty Cycle Select Register-- Index 03h
Power on default [7:0] = 1111,1111 b
BIT
NAME
READ/WRITE
DESCRIPTION
7-0 F2_DC[7:0]
Read/Write
FanPWM2 Duty Cycle. This 8-bit register determines
the number of input clock cycles, out of 256-cycle
period, during which the PWM output is high. During
smart fan 2 control mode, read this register will return
smart fan duty cycle.
00h: PWM output is always logical Low.
FFh: PWM output is always logical High.
XXh: PWM output logical High percentage is
XX/256*100% during one cycle.
FAN Configuration Register-- Index 04h
Power on default [7:0] = 0000,0000 b
BIT
NAME
READ/WRITE
DESCRIPTION
7-2 Reserved
Read/Write Reserved
5-4 FAN2_MODE
Read/Write
FAN 2 PWM Control Mode.
00 - Manual PWM Control Mode. (Default)
01 - Thermal Cruise mode.
10 - Fan Speed Cruise Mode.
11 - Reserved.
3-2 FAN1_MODE
Read/Write
FAN 1 PWM Control Mode.
00 - Manual PWM Control Mode. (Default)
01 - Thermal Cruise mode.
10 - Fan Speed Cruise Mode.
11 - Reserved.
1 FAN2_OB
0 FAN1_OB
Read/Write
Read/Write
Enable Fan 2 as Output Buffer. Set to 0, FANPWM2
can drive logical high or logical low. Set to 1,
FANPWM2 is open-drain
Enable Fan 1 as Output Buffer. Set to 1, FANPWM1
can drive logical high or logical low. Set to 1,
FANPWM1 is open-drain
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Publication Release Date: May 30, 2005
Revision A1