SAM D21, 4 seconds to boot, 48 MHz clock sync

AT91SAM9 Evaluation Boards

Moderator: nferre

rubear
Posts: 5
Joined: Mon Nov 30, 2015 12:55 am

SAM D21, 4 seconds to boot, 48 MHz clock sync

Thu Dec 29, 2016 10:49 pm

Hi,

I am seeing a bit over 4 seconds to get past system_clock_init(). I am using 48MHz in closed loop mode.

Is this normal?

Thanks,
-Robert

Update, I had CONF_CLOCK_XOSC32K_STARTUP_TIME set to SYSTEM_XOSC32K_STARTUP_65536,
which I would have expected a delay of 2 seconds. In any case, I changed it to SYSTEM_XOSC32K_STARTUP_32.
This decreased the delay to a few milliseconds. USB is working. Any problems with setting this to such a short time?

-Robert

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