8B10B Datasheet, PDF (4/12 Pages) Altera Corporation – Encoder/Decoder

consecutive errors required to force a resynchronization is
programmable, from 2 to 16 (default is 6). The transceiver
then resynchronizes the data on the rising edge of RBC1 using
K28.5 codes. A pulse on the COMMA_DETECT input indicates
that the transceiver has reacquired sync. The 8b10b responds
by deasserting COMMA_DET_EN and asserting
WORD_SYNCn.
COMMA_DETECT
Synchronization
Block
COMMA_DET_EN
W ORD_SYNCn
RX_DATA[9:0]
RBC0
D
Q
D
Q
D
Q
D
Q
RBC1
Figure 3 • 8b10b Receiver Block Diagram
Decode
Block
D
Q
D
Q
CODE_ERRORn[1:0]
RX_W ORD[15:0]
RX_K_CHAR[1:0]
RX_CLK
4