W83627HF/ F/ HG/ G
7.5.3 Temperature 1 SMI# modes
The W83627HF 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 in-
terrupt 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. （See Figure 8.8 ）
Figure. 8.8 Temperature 1 SMI# Comparator Interrupt Mode
（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 tem-
perature remains above the THYST, the interrupt will not occur. （See Figure 8.9）
Figure. 8.9 Temperature 1 SMI# Two-Times Interrupt Mode
Publication Release Date: June 09, 2006
- 39 -
Revision 2.27
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