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ADS131A02: ADS131A02 can not be used with C2000 series chip.

Steven Xu
Prodigy 130 points
Part Number: ADS131A02

Hi, Expert

I am debugging the extern ADC chip named ADS131A02 work with TMS320F28P65. then I find the register of ADS131A02 is only 8 bits, so I select the communication data mode is 8bits about SPI module.

After the setting operation of ADS131A02, it cannot send the right data to DSP. 

The extern ADC chip startup setting code is below screenshot shows:

the waveform of oscilloscopeis below:

the Peripheral circuit of ADS131A02 is below:

I am wondering if the ADS131A02  can work with C2000 series chips, as I only find the demo code with MPS series chips. 

or if it can work with C2000 chips, can you give me some advice to solve this question.

  • 0
    TI__Guru 52146 points

    Hi Steven Xu,

    The ADS131A02 should be able to interface with a C2000 processor

    In your case, it never seems like the ADC is coming out of RESET because you never get the correct response to your NULL command (which should be 0xFFdd, where dd is 02 using the ADS131A02). If you do not receive this response from the NULL, the rest of the commands will not work

    Are you sure the power and clock signals are correctly applied, and have you verified that the RESET pin is high?

    -Bryan