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keep activating FM loop while in system sleep mode.

Texas Instruments2
Intellectual 2350 points

Hi,

During system sleep mode, OMAP deasserts CLKREQ and NSLEEP1 signal to put PMIC into sleep mode.

And FM radio playback uses path from AUX_IN to Speaker/headset output.

In case system sleep happens while doing FM radio playback, FM radio path is also disabled and output sound stops.

 

Could you guide me how I can prevent FM stops in system sleep mode?

I also should consider about power consumption and would like to minimize the consumption.

 

Thank you.

 

Best Regards,

Logan

  • 0
    TI__Genius 15100 points

    Hi Logan,

    If CLKREQ is low then I think you are also shutting your system clock - HF clk. If this happens then audio block doesnt have any clocks. The system clock generates the required clocks. If you want to still use sleep mode and keep HF clock active then you can program the HFCLKOUT_REMAP register to keep clock active.

    This will result in higher consumption because clock is active. This is the only way to get clocks to audio module to keep FM ON.

     

    Regards,

    Gandhar.