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But, what if i want to receive an unknown pattern outside the fpga (without encoding)? Isn't it possible? What i mean is, i can receive only patterns with many transitions? And what about other patterns? I cannot receive them?
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It depends.
Transceiver receiver channels include a clock-and-data recovery (CDR) unit, which is essentially a PLL that locks to the transitions in the data stream *and* centers the capture of data bits.
It is possible to create custom interfaces, but it is highly dependent on the end application. For example, you can configure the interface in lock-to-reference mode, so that the CDR does not need to lock to data transitions. However, you then lose the feature where the receiver aligns to the center of bits. That may be ok ... but it depends on your application.
Describe what you really want to do, and readers of this forum will provide feedback.
Cheers,
Dave
Honored Contributor
