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ADS131E08 isn't responding

Anat Ben Lulu
Prodigy 20 points

Hello,

I'm using ADS131E08 and I'm trying  to read the ID Control Register but I don't get answer.

On the other hand, I succeeded to write to the GPIO Register.

The command for writing to GPIO register:

cmd [0] = 0x40 + 0x0014;
cmd [1] = 0; 
cmd [2] = value;

The command for reading ID register:

ads_cmd [0] = 0x20 + 0x0000; 
ads_cmd [1] = 0x0;

Any suggestion?

Thanks,

Anat

  • 0
    TI__Mastermind 23235 points
    Hello Anat -
    1. Are you performing the reset according to the Power-Up sequence shown in the datasheet? If not, the device may not start-up properly and the ID register will not read correctly.
    2. Are you sending a SDATAC command before trying to read/write the part? The device starts up in RDATAC mode, so this must be stopped before you can read or write to the device (see RDATAC in datasheet)

    Additionally, if you could send us a scope shot of the SPI communication when you try and read it would help us to debug your issue.
  • 0 in reply to Greg Hupp
    Prodigy 20 points

    Hello Greg,

    Thanks a lot for your answer.

    It seems that I missed your second solution in the datasheet.

    That was the problem!!!

    Thanks,

    Anat