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High Limit

Low Limit

Conversions Done

Alert Flag

Status Register

Reads

Alert Pin

SMBus Alert

Response

Violating Condition:

Limit Mode

Violating Condition:

Window Mode

High Limit

Low Limit

Alert Flag

Status Register

Reads

Alert Pin

SMBus Alert

Response

Conversion Completed

TMP007

SBOS685C – APRIL 2014 – REVISED JULY 2015

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Device Functional Modes (continued)

7.4.2.1 INT Mode (INT/COMP = 0)

In this mode the high and low limits form a limit window. The ALRTEN bit must be asserted if the ALERT pin

functionality is desired. If the calculated temperature is above the high limit or below the low limit at the end of a

conversion its respective enabled flag is asserted.

Figure 27. INT Mode

After the flag is asserted, it can only be cleared by a read of the status register, which clears the flag and the pin.

The ALERT pin can also be cleared by the SMB alert response command (see the SMBus Alert Function

section); however, this action does not clear the flag.

7.4.2.2 COMP Mode (INT/COMP = 1)

In COMP mode, the limits are used to form an upper limit threshold detector. If the calculated temperature is

above the high limit, the high limit flag is asserted. The high limit flag is then deasserted only after the

temperature goes below the low limit. The low limit register value determines the degree of hysteresis in the

COMP function. In COMP mode, only the high limit enable has effect on the limit flags. The low limit enable flag

does not have any effect on the low limit flags and the low limit flags always read 0. In this mode, the flags are

asserted and deasserted only at the end of a conversion and cannot be cleared by a status register read or an

SMB alert response.

Figure 28. COMP Mode

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