W83697HG Datasheet, PDF (33/109 Pages) Winbond – WINBOND LPC I/O

W83697HF/ HG
6.5.4 The W83697HF temperature sensor 2 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 9.10 )
(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 9.11 )
T_OI
T_HYST
SMI#
T_OI
T_HYST
*
*
**
SMI#
*
*
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 9.10
Figure 9.11
- 30 -