can CCM_CLKo1 of imx6 provide 32.768Khz clock when imx6 is in sleep status?

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can CCM_CLKo1 of imx6 provide 32.768Khz clock when imx6 is in sleep status?

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fangmingan
Contributor I

on our platform , wifi module need  a SLEEP_CLK(32.768K) for low power.

At the beginning, I want to use CCM_CLKO1 to supply this 32.768Khz clock.

But i don't know whether CCM_CLKo1 can still supply 32.768K clock  after  cpu enter sleep status


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AnsonHuang
NXP Employee
NXP Employee

For sleep state, you mean suspend, right? As all clocks are gated in suspend, although external 32k clock is still there for RTC, but I am afraid you may not get it from CLKO1, you can have a try, if CLKO1 can output 32k in run state but can not in sleep, then I think it is gated. Not very sure about it, better to have a try.

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AnsonHuang
NXP Employee
NXP Employee

For sleep state, you mean suspend, right? As all clocks are gated in suspend, although external 32k clock is still there for RTC, but I am afraid you may not get it from CLKO1, you can have a try, if CLKO1 can output 32k in run state but can not in sleep, then I think it is gated. Not very sure about it, better to have a try.

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