about the 8B/10B encoder altgx

3k Rbugalho.

According with what your said, if the RD's toggle don't have a rule, how the 8B/10B decoder do? are y sure this?

the manual( stx4_siv520001.pdf) write "After reset, the 8B/10B encoder starts the LSByte with a negative disparity (RD-)

and the MSByte with a positive disparity (RD+) and transmits six K28.5 code groups

(three on the LSByte and three on the MSByte encoder) for synchronizing before it

starts encoding and transmitting data. "

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I don't see a problem.

It's just how 8B/10B works: RD doesn't always toggle from byte to byte.

Consider a single encoder:

a) Most cases are encoded such that RD toggles after each byte.

b) However, there are some cases which are encoded in such a way that the RD stays the same.

For the double encoder scheme, which are used for every other byte, this becomes:

a) Most cases, each encoder's RD stays quiet.

b) In some cases, both encoders toggle their RD.

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