AWR6843: Behavior when an external clock fails

Shige

Prodigy 20 points

Part Number: AWR6843

Tool/software:

Hello,

I want to know behavior when an external clock fails.

Does the AWR6843 clock switch to the internal clock(10MHz) and work?

Thanks,

Shige

4 months ago

0 Voona Deexith 4 months ago

TI__Intellectual 2000 points

Hello,

Yes, In the event the REF CLK (external clock) is not within the permissible range (40 - 100MHz), the CPUCLK is switched to RCCLK (internal 10MHz +/- 10%) during the course of wake-up.

For additional details on the clock section, you can refer to the section 5.2 of the 6843 TRM: https://www.ti.com/lit/ug/swru520e/swru520e.pdf

Very Respectfully,

Deexith.

0 Shige 4 months ago in reply to Voona Deexith

Prodigy 20 points

Hello,

Thank you for your response.

I have 2 more questions.

1. Is CCS debug possible with RC CLK?

2. I changed the following software to output Nerror_out if the result of MssDiag_bootTestStatust is not DIAG_SUCCESS.

When an external clock failed, Nerror_out was not output. Could you think of anything that might have caused it?

ti\radar_toolbox_2_00_00_06\source\ti\examples\diagnostic_monitor_ref

retVal = MssDiag_bootTestStatus(NULL);

if ( retVal !=DIAG_SUCCESS) {

outputNerror();

}

Thanks,

Shige

0 Voona Deexith 4 months ago in reply to Shige

TI__Intellectual 2000 points

Hello,

We are looking into your questions. Please allow us some time to respond.

Very Respectfully,

Deexith.

0 Tim Henderson 4 months ago in reply to Voona Deexith

TI__Expert 8772 points

Hi,

Can you please let us know what retVal is in this case? How are you sure the external clock has failed?

CCS Debug should be possible with RCCLK as the source.

Regards,

Tim

0 Shige 4 months ago in reply to Tim Henderson

Prodigy 20 points

Hello,

If external clock has failed, I think ESM Group1(ANA_LIMP_MODE) becomes to error by bootloader. I removed external clock from a board.
So, I think retVal is DIAG_EDATA in this case.
But, Nerror_out wasn't output.

Could you think of anything that might have caused it?

I could not connect the board with CCS Debug(XDS110) in this case.
I want to know how to connect without external clock.

Regards,

Shige

0 Tim Henderson 4 months ago in reply to Shige

TI__Expert 8772 points

Hi,

This will take some investigation from our side. Please allow us a few days.

Regards,

Tim

0 Shige 4 months ago in reply to Tim Henderson

Prodigy 20 points

Hi,

Could you let me know if there is any update on this?

Regards,

Shige

0 Tim Henderson 4 months ago in reply to Shige

TI__Expert 8772 points

Hi,

Can you try running some of the monitoring APIs found in our ICD?

mmwave_dfp_01_02_06_03/docs/mmWave-Radar-Interface-Control.pdf

For example: AWR_MONITOR_DUAL_CLOCK_COMP_REPORT_ AE_SB If you try this API, are you able to see a failure in any of the clock pairs?

Regards,

Tim

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AWR6843: Behavior when an external clock fails