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AM335X CLKOUT2 providing 32.768kHz in sleep mode ?

Christoph Apel
Intellectual 540 points

Hi!

we have a 32.768kHz quartz attached at OSC1 of the processor and would like to use CLKOUT2 pin to output this clock even when the core is asleep and system running in suspend to RAM mode.I cannot see in technical referencemanual and datasheet of that is possible. I am aware that the clock needs to be activated in SW first, that is o.k. as long as it keeps running permanently after initial configuration.

thanks and regards,

Christoph

  • 0
    TI__Guru* 86950 points

    Christoph, this should work fine.  The path for CLKOUT2 is fairly straightforward (see figure 8-14 in the TRM) and does not depend on core domain.  You would have to maintain the RTC domain if you are using the 32K Osc in the RTC

    Regards,

    James