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Transport Stream Interface (TSIF) on DM365 ?

Daniel Medeiros
Prodigy 70 points

Dear all,

I'm planning to use DM365 with a device that has the TS interface as the MPEG2 transport stream interface.

Does anybody know how to implement it ?

It is impossible to put it on SPI interface due to the TS interface clock frequency (60 MHz).

I was thinking of using a FIFO, a CPLD or something like that but the prices are too high.

 

Regards,

Daniel Medeiros

  • 0
    TI__Mastermind 37340 points

    Daniel,

    how much data (MB/sec) are you trying to move in?  we can consider a variety of alternatives (SPI, USB, EMAC, EMIF, even the video port itself in RAW  mode)

  • 0 in reply to Juan Gonzales
    Prodigy 70 points

    Hi Juan,

     

    Thank you for answering me. The device is a ISDB-T demodulator.

    For the Brazilian Standard the data rate will be between 3.65 Mbps and 23.23 Mbps depending on what is broadcasted.

    I have the option for using MPEG2 Transport Stream in Serial and Parallel modes. There is also a FIFO mode.

    I was thinking of using the serial output with DM365 SPI, but there is a 60MHz signal in the TS Interface.

     

    For the serial mode, the signals are:

    MPDATA[0]: MPEG2-TS data bits (msb first)

    MPDATA[1]: bit-envelope of the 204 bytes

    MPDATA[2]: bit-envelope of the 188 bytes

    MPDATA[3]: msb position of the 204 bytes

    MPDATA[4]: msb position of the 188 bytes

    MPDATA[5]: clock gated with MPDATA[1]

    MPDATA[6]: clock gated with MPDATA[2]

    MPDATA[7]: 60 MHz clock (not gated reference clock of the circuit)

    MPSTR: envelope of the start byte

    MPFRM: envelope of the 188 bytes

    MPCLK: byte pseudo-clock (high jitter)

    I'll use only the 188 bytes word.

     

    Regards,

     

    Daniel Medeiros

  • 0 in reply to Daniel Medeiros
    TI__Mastermind 37340 points

    Hi Daniel,

    FYI, we do have a 300 MHz version of DM365 which should be able to run SPI at 135/2 or 67.5 MHz.  Otherwise we could consider USB or Ethernet interfaces as alternatives.

  • 0 in reply to Juan Gonzales
    Prodigy 70 points

    Dear Juan,

     

    Can you specify me witch version it is ?

    I was looking at TI's DM365 Datasheet. And it is mentioning 25ns min clock period.

    Thank you for your support.

     

    Daniel

  • 0 in reply to Daniel Medeiros
    TI__Mastermind 37340 points

    It appears you are right, I was only taking SYSCLK4 into account, but page 164 of the data-sheet does impose the 25 ns restriction.