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TMS570LS3137: external oscillator failover

Part Number: TMS570LS3137

Tool/software:

Hi, 

Referring to the below tutorial and datasheet snippet, I am wondering could it be possible to failover between two external oscillators - namely from the main external OSCIN to EXTCLKIN1 or EXTCTLIN2 (similarly to the resources example with switching from the OSCIN to the internal LPO)?

Thanks.

  • Hi Varban,

    No, it won't switch to the EXTCLKIN1 or EXTCLKIN2. If oscillator fails, then only HF LPO will clock the GCM module as mentioned below:

    Similarly, if PLL slip issue occurs, then first oscillator will directly drive the GCM bypassing the PLL. However, if oscillator also fails then again HF LPO will source the GCM module.

    --
    Thanks & regards,
    Jagadish.