W83697HF Datasheet, PDF (101/167 Pages) Winbond – WINBOND I/O

W83697HF/F
9.5. 3 The W83697HF temperature sensor 1 SMI# interrupt has two modes:
(1) Comparator Interrupt Mode
Setting the THYST (Temperature Hysteresis) limit to 127°C will set temperature sensor 1 SMI# to the
Comparator Interrupt Mode. Temperature exceeds TO (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 TO, then reset, if the temperature remains above the TO , the interrupt
will occur again when the next conversion has completed. If an interrupt event has occurred by
exceeding TO and not reset, the interrupts will not occur again. The interrupts will continue to
occur in this manner until the temperature goes below TO. (Figure 9.8 )
(2) Two-Times Interrupt Mode
Setting the THYST lower than TO will set temperature sensor 1 SMI# to the Two-Times Interrupt Mode.
Temperature exceeding TO causes an interrupt and then temperature going below THYST 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 TO, then reset, if the temperature
remains above the THYST , the interrupt will not occur. (Figure 9.9 )
(3) One-Time Interrupt Mode
Temperature exceeding TO causes an interrupt and then temperature going below THYST will not cause
an interrupt. Once an interrupt event has occurred by exceeding TO , then going below THYST an
interrupt will not occur again until the temperature exceeding TO . (Figure 9.9)
Figure 9.8
Figure 9.9
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Publication Release Date: Feb. 2002
Revision 0.70