AWR1243: After NRESET, INTR becomes High and SPI communication not working properly.

Hitoshi Sugawara

Mastermind 19650 points

Part Number: AWR1243

Hi Experts,
We have been facing a problem about the SPI communication between AWR1243 and an external FPGA.
After NRESET is set to HIGH, INTR becomes and keeps HIGH.
So, during this condition, SPI communication seems that it might not be working properly.
Could you please look into it and let us know your observation?

The attached file shows each line level when NRESET is set to HIGH.
If you need any other information, please let me know.
Best regards,
Hitoshi

7532.20170814_TI_AWR1243_NRESET.pdf

over 8 years ago

0 Raghunandan Kamath over 8 years ago

TI__Mastermind 22155 points

Hitoshi-san,

Can you please confirm the following?

1) Are you trying to configure the device by sending raw streams from the FPGA?

3) Have you flashed the AWR1243 ES2.0 device with the ES2.0 firmware that is available in the MMWAVE-DFP ?

4) Have you followed the "Section 3.2 Communication Sequence" in the Radar Interface Control document to send the message/receive message from the device?

BR,

Raghu

0 Hitoshi Sugawara over 8 years ago in reply to Raghunandan Kamath

TI__Mastermind 19650 points

Hi Raghu,
Thank you for your prompt rely.
Will check your questions and let you know soon.

By the way, I would like to confirm with you first as follow:
After NRESET line is set to HIGH, the INTR line becomes HIGH.
– Q. Is it correct response by AWR1243?

Best regards,
Hitoshi

0 Raghunandan Kamath over 8 years ago in reply to Hitoshi Sugawara

TI__Mastermind 22155 points

Hitoshi-san,
I assume that along with the NRESET line the FPGA is also controlling the SOP lines(TDO, PMIC, SYNC_OUT) .
When the NRESET is high and the SOP mode is set to 4 , we will see the INTR line becoming HIGH.

BR,
Raghu

0 ck2_m over 8 years ago in reply to Raghunandan Kamath

Intellectual 720 points

Hi Raghu,

Thank you very much.

There was an answer to another thread about this thread problem.
e2e.ti.com/.../2267188

My customer has INTR lowed by correcting the thread's answer and H / W flaw.

Best regards,
Maekawa

0 Raghunandan Kamath over 8 years ago in reply to ck2_m

TI__Mastermind 22155 points

Hello Maekawa-san,

Good to know the issue is resolved.
Can we close this thread?

BR,
Raghu

0 ck2_m over 8 years ago in reply to Raghunandan Kamath

Intellectual 720 points

Hi Raghu-san,

Yes, it is okay to close this thread.

Thank you very much.

Best regards,
Maekawa

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AWR1243: After NRESET, INTR becomes High and SPI communication not working properly.