PM7347 datasheet(297/341 Pages) PMC

297 / 341 page

S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

297

Document ID: PMC-1990267, Issue 3

The Receive Bipolar E3 Stream diagram (Figure 33) shows the operation of the S/UNI-JET while

processing an HDB3-encoded E3 stream on inputs RPOS and RNEG. It is assumed that the first

bipolar violation (on RNEG) illustrated corresponds to a valid HDB3 signature. A LCV is

declared upon detection of four consecutive zeros in the incoming stream, or upon detection of a

bipolar violation which is not part of a valid HDB3 signature.

Figure 34 Receive Unipolar E3 Stream

RCLK

RDATI

FA11

RLCV

INFO X+1

INFO N INFO N+1 INFO N+2 INFO N+3 INFO N+4 INFO N+5 INFO N+6

INFO X

FA12

LCV INDICATION

The Receive Unipolar E3 Stream diagram (Figure 34) shows the unipolar E3 receive signal on the

RDATI input. LCV indications, detected by an upstream HDB3 decoder, are indicated on input

RLCV. RLCV is sampled each bit period. The PMON LCV Event Counter is incremented each

time a logic one is sampled on RLCV.

Figure 35 Receive Bipolar J2 Stream

B8ZSsignature

0 V

RCLK

RNEG

RPOS

0 0

00 0

8zeros

LCV

EXZ

The Receive Bipolar J2 Stream diagram (Figure 35) shows the operation of the S/UNI-JET while

processing a B8ZS-encoded J2 stream on inputs RPOS and RNEG. It is assumed that the first

bipolar violation (on RNEG) illustrated corresponds to a valid B8ZS signature. A LCV is declared

upon detection of a bipolar violation which is not part of a valid B8ZS signature. An excessive

zeros indication is given when 8 or more consecutive zeros are detected.

PM7347 Datasheet(PDF) 297 Page - PMC-Sierra, Inc