• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 2 answers
  • Subscribers 46 subscribers
  • Views 242 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS52J65: DEMOD 3-wire mode MISC 0x2E

HSato
Prodigy 30 points
Part Number: ADS52J65


(1) For DEMOD Reg (90h - 9Fh), it seems that can't set to 3-wire mode by SPI readout.  Of cource we set SENZ1=0, SENZ2=0.

      We had been confirmed 3-wire readout for other registers.

　　Should it be possible to 3-wire mode for DEMOD Reg ?

(2) In MISC 0x2E  Register VCM_FINE_PROG readout, it indicates some unclear values apart from lower 3bit.

    The Reset value should be all 0.

    Please tell me this behavior.

  • 0
    TI__Expert 7130 points

    Hi Hiroto-san,

    Thanks for reaching out.

    I understood your concern, just wanted some clarifications

    1. With respect to 3-wire SPI mode, are you facing difficulty in writing to demod register or reading from demod register? or both?

    Generally, before reading any register, you will have to make SPI_DIG_EN pin high (since read en is not in the demod page), then set the read en. After that, if you are accessing the demod register, you make SPI_DIG_EN =0 (same as SENZ1 = 0 , SENZ2 =0)

    Could you please share your sequence of operations for me to verify?

    2. It is possible that register 2E [15:3] might be coming from internal fuse. So it may contain some value apart from zero. The VCM_FINE_PROG bits should be correct, thats all.

    Do you read the same value in the bits [15:3] all the time or the value is different on consecutive readouts.

    Thanks & regards,

    Abhishek

  • 0 in reply to Abhishek Vishwa1
    TI__Expert 7130 points

    Hi Hiroto-san,

    I am closing this thread as well.

    The 3Wire SPI (demod) is not supported in ADS52J65

    Regards,

    Abhishek