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Stopping ADS1259's Continuous Mode

Aleksandar Milanovic
Prodigy 10 points
Other Parts Discussed in Thread: ADS1259

Hi All .. Would someone PLEASE  help with the following :

1- ADS1259   to write to reg .. MUST send SDATC ... should this be sent on its own  in other words CS..LOW  .. send 0x11...CS high  and than follow to initialize regs .? Or can you inegrate it under same CS with rest of the staff that is sent to the IC ? 

2. I have a trouble to stop continuous mode . No matter what I do it will stay in default power up mode .

3. when you power up the 1259  I do not see DRDY pin activity every 100ms . Can it power up in SLEEP mode ? 

4 can REST and some other direct commands be sent without 011h sent before it ?

Alex

  • 0
    TI__Mastermind 44680 points

    Hi Aleksander,

    Welcome to the TI E2E Forums!

    I decided to start a new forum thread to answer your questions:

    1. Yes, SDATAC should be sent before writing to the registers. It only needs to be sent once and it can be within the same /CS low "frame". Sending this command within its own /CS "frame" is fine too.
    2. How do you know stop continuous mode is not exiting? By that I mean, are you unable to write to the registers?

      If you re able to capture an oscilloscope or logic analyzer screenshot of the SDATAC command, I could verify that your timing is correct.



    3. The device will power up in an active mode; however, there are 2^16 fclk cycles required for the clock and internal reference to settle. You should delay sending commands to the device during this time.


    4. Yes. Only the RWEG and RREG commands should be affected by the conversion read mode.

    Best Regards,
    Chris