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Original question:

PGA460-Q1: About digital raw data in PGA460-Q1

PGA460-Q1: Direct Data Burst Mode

Yash Pandya
Prodigy 90 points
Part Number: PGA460-Q1
Other Parts Discussed in Thread: TMS320F280023C

Hello everyone,

I am using PGA460-Q1 with TMS320F280023C microcontroller.

I want use direct data burst mode. For that I am using SPI peripheral with *MHz frequency.

To initiate that I have written 0x02 to TestMux Register and then Initiate P1 burst and listen command and then generating clock my sending 0xFF continuously as mentioned in datasheet, still I am getting all data as 0xFF.

I probe transducer also, there is no pulse on that. and as soon as I change TestMux register to 0x00 I am able to get pulses on transducer. What changes do I need to do to get direct data?  

  • +1
    TI__Genius 14476 points

    Hello Yash,

    I have not encountered this case before. That should be the proper means for executing a direct data burst for the rectifier output.

    Are you able to accurately read to read the contents of the device registers? I want to ensure the communication to the device is valid.

    These two lines of code should help debug the whatever is not functioning properly. 

    Issuing these commands should cause the SPI to change states and allow us to understand what may be causing your issue. 

    Please let me know if you have any questions.

    Thank you,

    Jacob