Figure 4. Status of the ALERT Pin in Different Modes

One-Shot Mode

The TMP112A features a one-shot mode. When the TMP112A is in shutdown mode, writing 1 to the OS

bit starts a single temperature conversion. During the conversion, the OS bit reads 0. The TMP112A returns to the

shutdown state at the completion of the single conversion, the OS bit reads 1. This feature is useful for reducing

power consumption when continuous temperature monitoring is not required.

Since the TMP112A only needs 26ms for a single temperature measurement (typical value), it can

achieve a higher conversion rate through this mode. When using one-shot mode, 30 or more conversions per

second are possible.

ALERT

The TMP112A has a temperature alarm function, by writing the TM bit in the configuration register as 0 or 1,

the TMP112A can be configured as comparator mode or interrupt mode to achieve different alarm functions.

In comparison mode (TM=0), when the number of times the temperature measurement result continuously

equals or exceeds the temperature upper limit register value THIGH reaches the value defined by the F1/F0 bits in the

configuration register (as shown in Table 4), the ALERT pin will be activated. The ALERT pin will remain active until

the number of times the temperature measurement result is continuously lower than the temperature lower limit

register value TLOW reaches the value defined by F1/F0.

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