NSE-8G™ Standard Product Data Sheet
Preliminary
REI are encoded in the V5 byte.
K30.7-
K30.7+
K23.7-
011110 1000
-
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b11, IDATA[5] =
REI = ‘b0
Low order path frame alignment. ERDI and
REI are encoded in the V5 byte.
-
100001 0111
000101 0111
IV5=’b1,
IDATA[0,4] = ERDI[1:0] = ‘b11, IDATA[5] =
REI = ‘b1
Low order path frame alignment. ERDI and
REI are encoded in the V5 byte.
111010 1000
ITPL=’b0
Non low-order path payload bytes.
9.3.3
9.3.4
Serial SBI336S and TelecomBus Alignment
The alignment functionality preformed by each receiver can be broken down into two parts,
character alignment and frame alignment. Character alignment finds the 8B/10B character
boundary in the arbitrarily aligned incoming data. Frame alignment finds SBI336S or
TelecomBus frame and multiframe boundaries within the Serial link.
The character and frame alignment are expected to be robust enough for operation over a cabled
interconnect.
Character Alignment Block
Character alignment locates character boundaries in the incoming 8B/10B data stream. The
character alignment algorithm may be in one of two states, in-character-alignment state and out-
of-character-alignment state. The two states of the character alignment algorithm is shown in
Figure 8.
When the character alignment state machine is in the out-of-character-alignment state, it
maintains the current alignment, while searching for a C1FP character. If it finds the C1FP
character, it will re-align to the C1FP character and move to the in-character-alignment state. The
C1FP character is found by searching for the 8B/10B C1FP character, K28.5+ or K28.5-,
simultaneously in ten possible bit locations. While in the in-character-alignment state, the state
machine monitors LCVs. If 5 or more LCVs are detected within a 15 character window the
character alignment state machine transitions to out-of-character-alignment state. The special
characters listed in Table 2 and Table 3 are ignored for LCV purposes. Upon return to in-
character-alignment state the LCV count is cleared.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
46
PMC [ PMC-SIERRA, INC ]
