• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Subscribers 46 subscribers
  • Views 551 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.

Jumper setting for serial interface

arlette affiavi
Prodigy 160 points

Other Parts Discussed in Thread: ADS58C48

Hi everybody,

I just want to ask you if someone can give me Jumper setting for serial interface for ADS58C48 EV.

I read this user's guide  http://focus.ti.com/lit/ug/slau313/slau313.pdf but there is just default EVM Jumper Setting, I don't know if this jumper setting it's valid for serial interface

thanks

Best regards

  • 0
    TI__Mastermind 29220 points

    Hi,

    The ADS58C48 does not have separate modes of operation for parallel configuration of the ADC by way of jumpers or serial configuration of the SPI register settings.  (Many of our *other* devices have a mode where if RESET is tied active then the SPI is disabled and these former SPI pins become control pins that may be set by jumpers for the more common modes of operation of the ADC.  The ADS58C48 does not have this 'parallel config' mode of operation.)  The 'serial' mode of operation to control the SPI registers of the ADC is available all the time.  No movement of jumpers is needed.

    There *is* an option to let an FPGA control the SPI signals through the Samtec connector instead of using the USB port on the EVM.  But the USB port on the EVM is the default master of the SPI signals.  If you wish to control the SPI signals through the Samtec connector from something like the TSW1200, then there are surface mount resistors that must be unsoldered and resoldered in different locations to make the Samtec connector source the signals.  This can be seen in the design database for the EVM.  The schematics, bill of materials and layout files for the EVM can be found on the TI web under ADS58C48EVM Design Package which is literature number slar053 at http://focus.ti.com/docs/toolsw/folders/print/ads58c48evm.html

    Regards,

    Richard P.

  • 0 in reply to Richard Prentice
    Prodigy 160 points

    Hi,

    thanks so much

    best regards

  • 0 in reply to arlette affiavi
    Prodigy 160 points

    Hi Richard

    I noted on the ADS58C48 EVM there is no connexion between the SPI signal of connector CONN_QTH_30X2-D-A and SPI signal of ADC or I don't see clearly

    but if I'm right, so It is not enough to unsolder and resolder.

    thanks

    Regards

  • 0 in reply to arlette affiavi
    TI__Mastermind 29220 points

    Hi,

    Please see these portions of the schematics from pages 6 and 3, I believe.  But again, this is only if you wish to drive the SPI signals from the connector.  As you can see from which resistors are DNI (Do Not Install) and which are installed by default, the SPI signals are driven by the USB chip U6 normally.

    Regards,

    Richard P.

  • 0 in reply to Richard Prentice
    Prodigy 160 points

    Hi Richard

    That's right, I to drive the SPI signals from the connector. And if I well understood, I have to unsoldered resistors of USB and resoldered these same resistors for FPGA.

    But  problem is that on the map we see no track realized between the connector and the signals SPI. May be it'is there and I don't see it.

    thanks

    Regards

  • 0 in reply to arlette affiavi
    TI__Mastermind 29220 points

    Check for continuity with an ohm meter.  The signals are routed on layer three (out of six layers).  The physical design package on the web site for the EVM has the layout files as well, and there are i believe free tools available for viewing gerber files for layout.  (This was copied from a pre-release version of the EVM since i had the pdf of that layout in front of me - the released version of the EVM should be very similar.)

    Regards,

    Richard P.

  • 0 in reply to Richard Prentice
    Prodigy 160 points

    Hi Richard

    Indeed, the signals are routed on layer three.

    your answers are very useful.

    thanks so much

    Regards