Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Why K28.5 is more frequent to be used among the 12 control character in 8b/10b

Hi, in 8b/10b encoding scheme, why the control character K28.5 is more frequent to be used among the 12 control character. What is the advantage of K28.5 among all? why the protocol will c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

K28.5 is used for synchronization purposes, the details depend on the 8B/10B variant. In a basic implementation, e.g. the Altera Megacore, K28.5 is inserted as idle character when no data is sent. It's filtered at the receiver.

Review the 8B10B Encoder/Decoder MegaCore Function User Guide for details.