w83l784r Winbond Electronics Corp America, w83l784r Datasheet - Page 40

• Manufacturer Part Number: w83l784r
• Description: Winbond H/w Monitoring Ic
• Manufacturer: Winbond Electronics Corp America

7.30 FAN 1 Duty Cycle Select Register-- 81h (
Power on default [7:0] 1111,1111 b
7.31 FAN 2 Pre-Scale Register-- Index 82h
Power on default [7:0] = 0000,0001 b
7-0
6-0
Bit
Bit
7
Confidential, For Beta-site Only
F1_DC[7:0]
PWM_CLK_SEL2
PRE_SCALE2[6:0]
N a m e
N a m e
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Fan 1 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
1 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:
(XX/256*100%) during one cycle.
PWM 2 Input Clock Select. This bit select Fan 2 input
clock to pre-scale divider.
0: 1 MHz
1: 125 KHz
Fan 2 Input Clock Pre-Scale. The divider of input
clock is the number defined by pre-scale. Thus, writing
0 transfers the input clock directly to counter. The
maximum divider is 128 (7Fh).
00h : divider is 1
01h : divider is 2
02h : divider is 3
-39 -
PWM
:
:
Bank 0
output
)
Description
Description
logical
Publication Release Date: Sep.
High
W83L784R
Preliminary
percentage
Revision 0.54
1999
is