MCP9808 datasheet(32/52 Pages) MICROCHIP

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MCP9808

DS25095A-page 32

FIGURE 5-10:

Alert Output Conditions.

TUPPER

TLOWER

TCRIT

TUPPER – THYST

Comparator

Interrupt

S/w Int. Clear

Critical Only

TCRIT – THYST

Notes

Alert Output Boundary

Conditions

Comparator

Interrupt

Critical

TA Bits

Alert Output (Active-Low/High)

TA ≥ TLOWER

High/Low

Low/High

High/Low

TA < TLOWER – THYST

Low/High

High/Low

TA > TUPPER

Low/High

High/Low

TA ≤ TUPPER – THYST

High/Low

Low/High

High/Low

TA ≥ TCRIT

Low/High

When TA ≥ TCRIT, the Alert output is forced to Comparator mode and the CONFIG<0> (Alert Output

Mode bit) is ignored until TA < TCRIT – THYST. In the Interrupt mode, if the interrupt is not cleared

(bit 5 of CONFIG), as shown in the diagram at

Note 6, then Alert will remain asserted at Note 7

until the interrupt is cleared by the controller.

TA < TCRIT – THYST

Low/High

High/Low

TLOWER – THYST

TUPPER – THYST

Notes:

Comparator

Interrupt

S/w Int. Clear

Critical Only

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