AWR6843AOP: Can't download program on our 6843 application board, need help

Hi Expert,

Could you send schematic to you via email?

Thanks

Daniel

Hi,

Have you tried uploading this same image to one of our EVMs? This would be a good first step to make sure that works.

Thanks,

Clinton

Hi,

We have completed the application development on the EVM, and now we are working on creating our own circuit board for use.

We have followed the reference manual for PCB layout, and the SOP settings are fixed.

The only exception is the toggle switch for switching between function mode and flash mode.

Hi,

So can you confirm this same app image can be flashed onto our EVM successfully?

Thanks,

Clinton

Sure, our app image can run smoothly.

Hi Clinton

Do you have any suggestions?

Thanks

Daniel

Hi Daniel,

It would be good to be able to review your schematic. Can you post that here?

Thanks,

Clinton

Hi Clinton

Attached file is the schematic.Thanks

Daniel

WR6843AOP.PDF

Hi Daniel,

We will look into the schematic and give you the feedback.

Thanks,

Sreedeep

Hi Sreedeep

Do you have any suggestions? Thank you

Daniel

Hi Daniel,

Can you please check if the device is booting up properly. Probe the Bandgap voltage and see if it is .9V. If yes, then connect JTAG to CCS and see if the sop register values are correct for flashing and functional modes. 

From a quick initial look at the schematic:

You can make the R103 resistor DNP. Also, the PMIC you are using is LP87524Q1. Can you use the same PMIC as in our EVM which is LP87524JRNFRQ1.

Thanks

Sreedeep

Can you inform us which node has a voltage of 0.9V?

Hi Sreedeep 

Where should the voltage be 0.9V?

Yes, PMIC is LP87524JRNFRQ1 and R103 resistor DNP

Thanks

Daniel

Hi Daniel,

The voltage is measured at the VBGAP pin of the device.

Thanks,

Sreedeep

Hi Sreedeep

The VBGAP pin on the measurement sample board does not have any voltage output.
If there is no voltage on the VBGAP pin, does it mean that the sample cannot work or be programmed normally.

Thanks

Daniel

Hi Daniel,

Yes, the sample cannot work without VBGAP voltage. 

Thanks,

Sreedeep