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matif's avatar
matif
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

How to give sync Pattern for 32 bit or 40 bit wide channel in altera custom phy transceiver ip?

​Hi, in altera transceiver custom phy ip, I selected channel length to be 40 bit. Now in syncpattern option, what value do I enter? I usually enter h'BC when my channel width is 8 bit or 16 bit?
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi,

The sync pattern requirement typically follow IP protocol requirement. For instance, your BC pattern is derived Ethernet K28.5 data pattern.

So, it's either you follow the protocol requirement or you are free to define your own data pattern as well.

In Custom PHY Intel FPGA IP, you can configure below parameter

  • pattern length : either 8, 16 or 32 bits
  • pattern value : to be any value or follow certain protocol requirement

Thanks.

Regards,

dlim

matif's avatar
matif
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

​Hi, thanks a lot for your reply. Just wanted to ask one more thing. The word allignment mode of automatic synchronization state machine and bit sllipping only works with 8 or 16 bits but I wana work with 40 bits transceiver channel. The thing is that I wana use rx_syncstatus port which I think works only if I have word allignment mode of automatic synchroniztion statemanchine or bit slipping is selected? There is another option of manual. What is that? Will rx_syncstatus still work if I select manual option?