Maximum run current of the watchdog

RE: Maximum run current of the watchdog

Remo — Fri, 31 Jan 2020 14:03:58 GMT

Thank you very much. It helped a lot!

RE: Maximum run current of the watchdog

Jared — Fri, 31 Jan 2020 10:03:37 GMT

Hi,

[quote user="Remosennhauser"][/quote]

Just for clarification, isn't the current of the LFRC or LFXO included in the remaining 1uA as well?

Yes, so the actual current of the peripheral will be less than 1 µA.

[quote user="Remosennhauser"]Another question, does the watchdog consume the current also when it is configured to halt while the CPU is sleeping? I'm asking this because my measurements didn't show a difference between a running and a halted watchdog.[/quote]

Almost the same, if the WDT is not configured to run then it would release the LFCLK and consume only ~0.1 µA to maintain its state.

Jared

RE: Maximum run current of the watchdog

Remo — Thu, 30 Jan 2020 15:16:18 GMT

Hi Jared

Thank you for your answer.

Just for clarification, isn't the current of the LFRC or LFXO included in the remaining 1uA as well?

Another question, does the watchdog consume the current also when it is configured to halt while the CPU is sleeping? I'm asking this because my measurements didn't show a difference between a running and a halted watchdog.

Best regards

Remo

RE: Maximum run current of the watchdog

Jared — Thu, 30 Jan 2020 14:10:12 GMT

Hi,

The maximum current specified in the specification is due to chip variation and is only for the watchdog peripheral. I used the power profiler kit and measured a total of 2.5 µA sleep current with RAM retention and the watchdog running. The sleep current with RAM retention is specified as typical 1.5 µA which means that the watchdog peripheral is using around 1 µA during sleep.

regards

Jared