W83627EHF_0611 Datasheet, PDF (46/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
T_OI
T_HYST
SMI#
*
*
*Interrupt Reset when Interrupt Status Registers are read
Figure 6.16
6.6.3.2. Temperature sensor 2(CPUTIN) and sensor 3(AUXTIN) SMI# interrupt has two modes
It is programmed at Bank0 Index 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 6.17 )
(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 6.18 )
T_OI
T_OI
T_HYST
SMI#
T_HYST
*
*
*
*
SMI#
*
*
*
*
Figure 6.17
*Interrupt Reset when Interrupt Status Registers are read
Figure 6.18
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