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DS250DF410EVM: How to get 24.33Gbps data out through CDR?

kailin zhao
Intellectual 260 points

Part Number: DS250DF410EVM
Other Parts Discussed in Thread: SIGCONARCHITECT, DS250DF410

24.33.cfg

25.78.cfg

Fullscreen Register_Diff_for channel 0.txt Download 
Addr		25.78Gbps	24.33Gbps
0x61		0xBC		0x3C
0x63		0xBC		0x3C
0x64		0xFF		0x00
0x67		0xE0		0x20

  • 0
    TI__Guru* 93570 points
    Hi Kailin,
    I was able to get the device to lock to 24.33Gps. I have attached SigconArchitect GUI below.

    Here is what I did:
    1). Used external 12.165GHz clock and applied to RX0.
    2). Setup channel 0 for 24.33Gbps and verified channel 0 is locked to 24.33Gbps
    3) Externally connected TX0 to RX1
    4). Setup channel 1 for 24.33Gbps and verified we are locked to 24.33Gbps.
    What to watch for:
    1). Make sure you click on Apply to All Channels and then click on Reset CDR All Channels after verifying signal is present
    2). If you are not using onboard PRBS generator, please check to make sure your source has correct frequency tolerance.

    Regards,,nasser
  • 0 in reply to Nasser Mohammadi
    Intellectual 260 points
    Hi Nasser

    I found the reson why I can not get 24.33Gbps data out.I used a imprecise clock to input RX0.Today I have got a clock generator of SI5345 and generator of 380.15625MHz,then DS250DF410 can lock to 24.33Gbps.

    thank you