STLM75 datasheet(13/37 Pages) STMICROELECTRONICS

13 / 37 page

STLM75

Operation

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2.4

Interrupt mode

In interrupt mode, the OS output first becomes active when the measured temperature

exceeds the TOS value a consecutive number of times as determined by the FT value in the

configuration register. Once activated, the OS can only be cleared by either putting the

STLM75 into shutdown mode or by reading from any register (temperature, configuration,

TOS, or THYS) on the device. Once the OS has been deactivated, it will only be reactivated

when the measured temperature falls below the THYS value a consecutive number of times

equal to the FT value. Figure 5 illustrates typical OS output temperature response.

Note:

The OS can only be cleared by putting the device into shutdown mode or reading any

TOS, clear, THYS, clear, TOS, clear, THYS, clear, and so forth). These interrupt mode resets of

the OS/INT pin occur only when the STLM75 is read or placed into shutdown mode.

Otherwise, OS/INT would remain active independently for any event.

Figure 5.

OS output temperature response diagram

These interrupt mode resets of O.S. occur only when STLM75 is read or placed in shutdown. Otherwise,

O.S. would remain active indefinitely for any event..

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