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RF430FRL152H: Something About ADC0 data.

Senhao Zhang
Intellectual 270 points
Part Number: RF430FRL152H

Hello,

        I have designed an application for ECG measurement using RF430FRL152H, I can observe the wave using an Oscilloscope, but I can't read change data using trf7970, the data always is FF3F, and when I using the RF430FRL152HEVM, I can read the change data.  could you plz tell me what the problem may be?     

there is my PCB design

Best regards

Senhao Zhang

  • 0
    TI__Genius 13035 points

    Hello Senhao,

    I think the data bytes in 0xFF3F are swapped by the ISO protocol. So the actual reading data is 0x3FFF, which is the ADC full scale value (see table 10-3 and figure 10-8 in the reference manual: https://www.ti.com/lit/pdf/slau506).

    Please check the following aspects of your application:

    Is the signal path at ADC0 identical on both of your setups?

    How did you modify the RF430FRL152HEVM to connect your signal to ADC0?

    Do you also have developed a customized firmware loaded to the RF430FRL152H device?

    Best regards,

    Andreas.

  • 0
    TI__Genius 13035 points

    Hi,

    I haven’t heard back from you for a while, so this tread is being closed. If you wish to continue the discussion, please post a reply with an update below (or create a new thread).

    Best Regards,
    Andreas.