
W83697HF/F
Publication Release Date: Feb. 2002
- 92 - Revision 0.70
9.5.3
The W83697HF temperature sensor 1 SMI# interrupt has two modes:
(1) Comparator Interrupt Mode
Setting the T
HYST
(Temperature Hysteresis) limit to 127
°
C will set temperature sensor 1 SMI# to the
Comparator Interrupt Mode. Temperature exceeds T
O
(Over Temperature) Limit 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
O
, 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
O
. (Figure 9.8 )
(2) Two-Times Interrupt Mode
Setting the T
HYST
lower than T
O
will set temperature sensor 1 SMI# to the 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 9.9 )
(3) One-Time Interrupt Mode
Temperature exceeding T
O
causes an interrupt and then temperature going below T
HYST
will not cause
an interrupt. Once an interrupt event has occurred by exceeding T
O
, then going below T
HYST
an
interrupt will not occur again until the temperature exceeding T
O .
(Figure 9.9)
Figure 9.8
Figure 9.9