IWR1443: Accuracy of the frame period

Hi Josh,

Thank you for your reply.

I would like to know how much fluctuations occur for the frame periodicity setting in the frameCfg command,

I didn't know where it was described in <MMWAVE_SDK2_INSTALL_DIR>/packages/ti/control/mmwavelink/docs/doxygen, so please let me know.

Best regards,

Hiroyuki

Hi Josh,

Thank you for your reply.

I understand that the frame period setting is 1LSB=5ns.

Since it can be set with an accuracy of 5ns, it can be assumed that the frame period accuracy of actual operation is also 5ns.Is this understanding correct?

And please tell me more.

5ns corresponds to one cycle of the 200MHz clock.

I think that the circuit counts the timer with the 200MHz clock and starts the frame with the Timer tick as the trigger.

If the IWR1443 tries to achieve a frame period accuracy of 5 ns, I think that it will be impossible to achieve it if software processing is performed from the Timer tick.

I presume that the pulse generated by the timer tick is directly input to the frame start processing circuit by hardware without going through software processing.

Is this guess correct?

Best regards,

Hiroyuki

Hi Hiroyuki, 

I believe this is correct but please allow me to confirm internally and get back to you with more info tomorrow.

Best Regards,

Josh

Hello, 

My apologies, I'm still looking into this. Please allow an additional day or two for me to investigate. Your patience is appreciated. 

Best Regards,

Josh

Hi Josh,

I'm looking forward to hearing from you.

Tahnks,

Hiroyuki

Hi Hiroyuki, 

Very sorry about the delay here. I'm still waiting on an answer from my systems team. Please expect a response early next week. Thank you again for your patience. 

Best Regards, 

Josh

Hi JOsh

Okay, I am waiting for your reply.

Regards,

Hiroyuki

Hi Josh,

What is the situation of this question?
Please update me [us] on the current situation.

Hiroyuki

Hi Hiroyuki, 

I apologize, I'm having a hard time getting the answers out of the relevant folks. I am still working to get you confirmation here. Your patience is appreciated.

Thank you, 

Josh

Hi Josh,

I understand the situation.

Thank you for your cooperation.

Regards,

Hiroyuki