In the JESD204C RX core, errors that require a full link re-initialization are signaled by deasserting SYNC~ for a period 16 frames. When this occurs, the transmitter should fall back out of data transmission mode and renegotiate the link as described in the previous device subclass sections.
The following error conditions require a full link reinitialization:
- Four consecutive 8B10B decoder errors (disparity or not in table).
- Four consecutive unexpected Kx.y characters (rxcharisk is expected only at the end of the frame).
- Eight consecutive alignment errors (multiframes not aligned to LMFC).
A TX might initiate a re-initialization using the data interface by sending four consecutive Kx.y characters. This causes the error condition above to be triggered in the receiver. K28.5 (0xBC) would normally be used for this.