Datasheet

MCP9843/98243
DS22153C-page 34 © 2009 Microchip Technology Inc.
FIGURE 5-12: Event Output Condition.
T
UPPER
T
LOWER
Event Output
T
CRIT
T
A
T
UPPER
- T
HYST
(Active-Low)
Comparator
Interrupt
S/w Int. Clear
Critical Only
T
CRIT
- T
HYST
1
2
3
4
5
7
TABLE 5-10: TEMPERATURE EVENT OUTPUT CONDITIONS
Note Output Boundary Conditions
Comparator Interrupt Critical T
A
Bits
Output State (Active Low/High) 15 14 13
1T
A
≥ T
LOWER
High/Low Low/High High/Low 0 0 0
2T
A
< T
LOWER
- T
HYST
Low/High Low/High High/Low 0 0 1
3T
A
> T
UPPER
Low/High Low/High High/Low 0 1 0
4 T
A
≤ T
UPPER
- T
HYST
High/Low Low/High High/Low 0 0 0
5 T
A
≥ T
CRIT
Low/High Low/High Low/High 1 1 0
6 When T
A
≥ T
CRIT
the Event output is forced to Comparator Mode and bits 0 of CONFIG (Event
output mode) is ignored until T
A
< T
CRIT
- T
HYST
. In the Interrupt Mode, if Interrupt is not cleared
(bits 5 of CONFIG) as shown in the diagram at Note 6, then Event will remain asserted at Note 7
until Interrupt is cleared by the controller.
7T
A
< T
CRIT
- T
HYST
Low/High High/Low High/Low 0 1 0
T
LOWER
- T
HYST
T
LOWER
-T
HYST
T
UPPER
- T
HYST
1
3
4
2
Note:
6
Event Output
(Active-High)
Comparator
Interrupt
S/w Int. Clear
Critical Only