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[TDA4M] Removal of RTC oscilator HW

Soolim Ruy
Intellectual 440 points
Other Parts Discussed in Thread: TDA2

Hi,

WKUP_LFOSC_XO/WKUP_LFOSC_XI external oscillator is used for low power operation.

RTC OSC can be shown at HW schematic of TDA4 EVM.

Q1) What is the functionality of using RTC OSC instead of using WKUP_LFOSC_XO/XI ?

Q2) Should WKUP_LFOSC_XO/XI be added in my customized board?

Q2) Can I remove RTC OSC HW if RTC OSC functionality which you will reply for my question is not needed ?

BR,

Soolim

  • 0
    TI__Genius 17720 points

    Hi Soolim,

    Q1) TDA4, unlike TDA2/TDA3, doesn't feature an internal RTC capability thus an external HW is required if RTC function is needed.

    Q2)  WKUP_LFOSC_XO/XI crystal is required for some of the SoC low power modes. This crystal is needed if some Timer modules need accurate 32.768k clock for your application. I would place crystal pads if not sure.

    Q3)  RTC IC can be skipped if  software doesn't need a real-rime clock function.

    Regards,

    Stan