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AlehTS's avatar
AlehTS
Icon for New Contributor rankNew Contributor
4 years ago
Solved

Arria10 transceivers and CSI

Hello. I have a task to receive data from CSI sensor. This sensor has CSI bus with 1 clock line and 4 data lines. Data are transferred on both edges of the clock. The clock rate is about 1.5GHz....
  • Deshi_Intel's avatar
    Deshi_Intel
    4 years ago

    HI,


    Pls see my reply below.


    1. Does this mean, that it is not possible to receive data without embedded clock ?
    • Correct. Transceiver architecture is meant to receive data transfer with embedded clock
    1. And generally, is it possible to receive data from CSI source using transceivers ?
    • From Intel FPGA perspective, we don't support MIPI IP solution
      • So, unfortunately this is something beyond Intel support plan and you will need to explore by yourself
      • One thing that raise my concern is you mentioned long continuous of 1 or 0 data pattern transfer. This is bad for transceiver receiver architecture and it will caused CDR to loose lock. For typical high speed protocol application, it will trigger to send "IDLE" data pattern to keep the CDR locked if there is no active data transfer on-going.


    Thanks.


    Regards,

    dlim


Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
4 years ago

HI,


You can always checkout below user guide doc to learn more about Arria 10 transceiver architecture.

Now to answer your question - transceiver refclk pin is used to perform following function

  • a) provide refclk to Tx PLL that used to clock transmitter Tx channel
  • or b) provide refclk to receiver Rx channel CDR
  • or do (a) and (b) together


Alright, I am now setting this case to closure.


Feel free to post new forum thread if you still have further enquiry in future


Thanks.


Regards,

dlim