W83627HF Datasheet, PDF (118/185 Pages) Winbond – WINBOND I/O

W83627HF/F
Figure 11.8
PRELIMINARY
Figure 11.9
11.5.4The W83627HF temperature sensor 2 and sensor 3 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 TO, 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 THYST. ( Figure 11.10 )
(2) 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 T_O , then reset, if the temperature
remains above the T_HYST , the interrupt will not occur. (Figure 11.11 )
T_OI
T_HYST
SMI#
T_OI
T_HYST
*
*
**
SMI#
*
*
*
*
Figure 11.10
*Interrupt Reset when Interrupt Status Registers are read
Figure 11.11
- 101 -
Publication Release Date: Jul 1999
Revision 0.53