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relation between tx_frame and burst mode for AD9364

Question asked by bhatnagar.vaibhav81 on Aug 25, 2015
Latest reply on Aug 28, 2015 by DragosB

Hello,

 

I am using KC705 with FMCOMMS4 (AD9364) with HDL ref. design Vivado2014.4.1 and last version of noOS driver.

 

I have a question regarding tx_frame signal that remains high at the given test point on the FMCOMMS4. I am using the default parameters (default_init_param structure) settings in main.c (attached herewith) except that two_rx_two_tx_mode_enable is set to zero because I have AD9364.

 

According to UG673 (reference manual) pg 102 fig 76, I was expecting the following behaviour,

timing_diagram_LVDS.png

where tx_frame is 50% duty cycle. However, I found that tx_frame is always high.

 

I found on pg 99 of UG673 the following

"Tx_FRAME can accept a single high transition at the beginning of a burst that stays high throughout the burst or a pulse train that has a rising edge at the beginning of each frame (50% duty cycle)."

 

so, I suppose that with the default parameters setting of main.c the FMCOMMS4 is in burst mode.

 

If it is so, does it have any relation with rx_frame_pulse_mode_enable parameters in default_init_param structure in main.c?


Could you please help us in order to change from burst mode to continuous mode?

 

Thanks in advance.

 

Best regards,

 

Vaibhav

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