• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 98 subscribers
  • Views 301 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.

McBSP to IOM slave interface

Pichet Ong
Prodigy 100 points
Other Parts Discussed in Thread: AM1808

Is it possible to configure the McBSP on AM1808 or OMAP L138 as a master that will interface to another device IOM slave? If so can I use CLKX1 as a sample rate generator to the IOM slave device?

Thanks,

  • 0
    TI__Genius 9490 points

    can you please clarify what an IOM is? is it an I/O master device?

    regards,

    miguel

     

  • 0 in reply to Miguel A. Alanis
    Prodigy 100 points

    IOM - ISDN Oriented Modular Interface. Application Report SPRA569A explain how to interface an IOM (master) bus to McBSP (slave). I would like to know if it possible to have McBSP as master then IOM as a slave device. If so what clock source (pin) should I use.

    Thanks,

  • 0 in reply to Pichet Ong
    TI__Genius 9490 points

    Pichet Ong,

    I can comment on the functionality from the MCBSP in this device.  

    The MCBSP has the capability to sourcing its sample rate generator a clock from the internal module clock, and then it can produce a master clock on CLKX or even CLKR if configured as internal.  Similarly the Frames will be then generated from the sample rate generator and act as Frame masters (via FSX), the DX and DR signals can carry the serial data IN/OUT, so there is a lot of flexibility offered by the MCBSP.  I'm not a very good expert on IOM protocol/timings etc.. so based on this it should guide you to evaluate if this is what's needed for you to use the MCBSP as needed.  Preferrably you can use the generated clock via CLKX as it will shift data out of the transmitter, CLKR can also be generated internally but this is used for the receiver to shift in data.  The MCBSP in your device is very simlar but has some enhancements from the MCBSP of the Appnote you referenced, one major one is the availability of FIFO, so ensure that this FIFO feature is turned off so it won't conflict with your IOM protocol etc..

    regards,

    miguel