W83782D Datasheet, PDF (28/73 Pages) Winbond – MONITORING IC

Preliminary W83782D
6.5.2 The W83782D temperature sensor 2 and sensor 3 SMI# interrupt has two modes and it
is programmed at CR[4Ch] bit 6.
(1) Comparator Interrupt Mode
Temperature exceeding T_O causes an interrupt and this interrupt will be reset by reading all the
Interrupt Status Register. Once an interrupt event has occurred by exceeding T_O, then reset, if
the temperature remains above the T_HYST, the interrupt will occur again when the next conversion
has completed. If an interrupt event has occurred by exceeding T_O and not reset, the interrupts
will not occur again. The interrupts will continue to occur in this manner until the temperature
goes below T_HYST. ( Figure 16-1 )
(2) Two-Times Interrupt Mode
Temperature exceeding T_O causes an interrupt and then temperature going below T_HYST will also
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_O , then reset, if the temperature
remains above the T_HYST , the interrupt will not occur. (Figure 16-2 )
TOI
TOI
THYST
THYST
SMI#
*
*
SMI#
*
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
*
*
Figure 16-1. Comparator Interrupt Mode
Figure 16-2. Two-Times Interrupt Mode
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