TMP411CD datasheet(21/48 Pages) TI2

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TMP411

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SBOS383D – DECEMBER 2006 – REVISED DECEMBER 2016

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Programming (continued)

9.5.10 SMBus Alert Function

The TMP411 device supports the SMBus alert function. When pin 6 is configured as an alert output, the ALERT

pin of the TMP411 can connect as an SMBus alert signal. When a master detects an alert condition on the

ALERT line, the master sends an SMBus alert command (00011001) on the bus. If the ALERT pin of the

TMP411 is active, the device acknowledges the SMBus alert command and returns the slave address on the

SDA line. The eighth bit of the slave address byte indicates if the high limit or low limit temperature settings

caused the alert condition. The bit is high if the temperature is greater than or equal to one of the temperature

high limit settings; the bit is low if the temperature is less than one of the temperature low limit settings. See

Figure 16 for details of this sequence.

If multiple devices on the bus respond to the SMBus alert command, arbitration during the slave address portion

of the SMBus alert command determines which device clears the alert status. If the TMP411 wins the arbitration,

the ALERT pin inactivates when the SMBus alert command is complete. If the TMP411 device loses the

arbitration, the ALERT pin remains active.

TMP411CD Datasheet(PDF) 21 Page - Texas Instruments