Tool/software:
Hi,
Does the TMP1075 has a UnderTemperature interrupt functionality? Or just OverTemperature?
I've been testing the scenario below, but unfortunately I get no signal on ALERT pin.
Scenario:
- Board is powered on at room temperature (20°C), and THigh is set to 60°C and TLow to 10°C.
- Interrupt is activated while device still measures (20°C)
- Temperature start to drop from 20°C until it reaches 0°C.
- A signal must be emitted via ALERT pin, regarding the UnderTemperature, to wake board and read current temperature. (DONT WORK, NO SIGNAL RECEIVED)
- After a while, temperature comes back to 20°C.
- Board resets sensor, and cycle repeats from first step again.
Shortly: I need an interruption to wake my board on:
- Consecutive UnderTemperature cases (T < TLow) since sensor start/reset.
- Consecutive OverTemperature cases (T > THigh) since sensor start/reset.
- Mixed Over/Under-Temperature cases (Over, Over, Under, Over, Under, Under...) since sensor start/reset.
and not only OverTemperature cases.
I found out this question here on the forum: https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/786430/tmp1075-alert-active-condition-in-interrupt-mode
which, from what I understood, the scenario above must works, but it simply not.
In case it is not possible to "work" with two limits (THigh and TLow) and interrupt trigger sources, independent
of each other, is there any other sensor from TI which is capable of handling such task?
Many thanks in advance,
Nathan
