Hi,
i'm wondering of proper methods for supply monitoring.
My system is supplied from battery.
It is important to check if the battery isn't discharged.

I'm thinking of implementing DS1232 watchdogs (i need to monitor couple different voltage supplies):
setting max tolerance (10%) and wiring watchdog ~RST output to microcontrollers external interrupt pin to detect low voltage condition (RST not connected). Is this way ok?

Is there any better/more convenient solution?
Share your experience, please.

I still come to some problems/questions:

1. "Note:...Watchdog can not be disabled. It must be strobed to avoid resets."
As i am 'in lack' of microcontrollers pins, i cant strobe watchdog. Can i ground watchdogs strobe input to let him think it is always strobed?
2. As i understand, i will get an continously transitioning output (1->0, 0->1) on ~RST when out of voltage tolerance appears. I would have to set edge trigerring interrupt in TCON, right? (the problem is i dont properly understand edge and level interrupts trigering. I find them quite similar. i've read datasheets, but still... I've read somewhere earlier that level transitioning is rarely used.)

I understood, that edge trigering is when 1-0-1 is captured.
What about level trigering? 1-0? That's it?

correct me, if i am wrong.
I'd appreciate some clarity on level triggering. Would you be so kind to give example, when level trigerring is used?

3. transition activated == edge activated?

Thanks,
Tom