w83l784r Winbond Electronics Corp America, w83l784r Datasheet - Page 25

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

progrmmed by BIOS or application software.
6.5.4 Fan Fault Alarm
count is higher than high limit count value(CR58h) or is less than low limit count value(CR59h), pin
FANFAULT# is asserted.
6.6 SMI#
6.6.1 Temperature
6.6.1.1 Comparator Interrupt Mode
6.6.1.2 Two-Times Interrupt Mode
Of cource, Smart Fan control system can be disabled and the fan speed control algorithem can be
Confidential, For Beta-site Only
Pin SMI# for temperature has 3 modes.
Temperature exceeding T
Interrupt Status Registers. Once an interrupt event has occurred by exceeding T
the temperature remains above the T
has completed. If an interrupt event has occurred by exceeding T
will not occur again. The interrupts will continue to occur in this manner until the temperature
goes below T
Temperature exceeding T
cause an interrupt if the previous interrupt has been reset by reading all the interrupt Status
Register. Once an interrupt event has occurred by exceeding T
remains above the T
W83L784R can monitor fan speed by detecting fan speed counter value. When fan speed
Count
HYST
PWM
Duty
Cycle
170
160
150
. ( Figure 19-1 )
HYST
100
50
0
, the interrupt will not occur. (Figure 19-2 )
O
O
causes an interrupt and this interrupt will be reset by reading all the
causes an interrupt and then temperature going below T
A
HYST
Figure 18.
-24 -
, the interrupt will occur again when the next conversion
C
O
, then reset, if the temperature
O
Publication Release Date: Sep.
and not reset, the interrupts
W83L784R
Preliminary
O
, then reset, if
Revision 0.54
HYST
will also
1999