W83791G Datasheet, PDF (33/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
T_OI
T_OI
T_HYST
T_HYST
SMI#
*
*
SMI#
*
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
*
*
Figure 12-3. Comparator Interrupt Mode
T_OI
Figure 12-4. Two-Times Interrupt Mode
T_HYST
SMI#
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 12-5. One-Time Interrupt Mode
Note. The IRQ interrupt action like SMI#, but the IRQ is level signal.
6.8.6 Over-Temperature (OVT#) for W83791D/G temperature sensor 1/2/3
(1) Comparator Mode:
Temperature exceeding T_O causes the OVT# output activated until the temperature is less than T_HYST.
(Figure 13)
(2) Interrupt Mode:
Temperature exceeding T_O causes the OVT# output activated indefinitely until reset by reading
temperature sensor 1 or sensor 2 or sensor 3 registers. Temperature exceeding T_O, then OVT# reset,
and then temperature going below T_HYST will also cause the OVT# activated indefinitely until reset by
reading temperature sensor 1 or sensor 2 or sensor 3 registers. Once the OVT# is activated by
exceeding T_O, then reset, if the temperature remains above T_HYST, the OVT# will not be activated
again. ( Figure 13)
(3) ACPI Mode
At this mode, temperature exceeding one level of temperature separation, starting from 0 degree,
causes the OVT# output activated. OVT# will be activated again once temperature exceeds the next
level. OVT# output will act the same manner when temperature goes down. (Figure 13-1)
- 27 -
Publication Release Date: April 14, 2006
Revision 1.1