PM7345 datasheet(96/306 Pages) PMC

96 / 306 page

PM7345 S/UNI-PDH

DATA SHEET

PMC-931011

ISSUE 6

SATURN USER-NETWORK INTERFACE

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

PMON EXZS Count Registers. When EXZSO is set to logic 1, any excessive

zeros occurrences over an 85 bit period increments the PMON EXZS counter by

one. When EXZSO is set to logic 0, summed LCVs are accumulated in the

PMON EXZS Count Registers. A summed LCV is defined as the occurrence of

either BPVs not part of a valid B3ZS signature or 3 consecutive zeros (or

excessive zeros if EXZDET=1) occurring over an 85 bit period; each summed

LCV occurrence increment the PMON EXZS counter by one.

BPVO:

The BPVO bit enables only bipolar violations to indicate line code violations and

be accumulated in the PMON LCV Count Registers. When BPVO is set to logic

1, only BPVs not part of a valid B3ZS signature generate an LCV indication and

increment the PMON LCV counter. When BPVO is set to logic 0, both BPVs not

part of a valid B3ZS signature, and either 3 consecutive zeros or excessive zeros

generate an LCV indication and increment the PMON LCV counter.

AISONES:

The AISONES bit controls the pattern used to detect the alarm indication signal

(AIS) when both AISPAT and AISC bits in DS3 FRMR Configuration register

(08H) are logic 0; if either AISPAT or AISC are logic 1, the AISONES bit is

ignored. When a logic 0 is written to AISONES, the algorithm checks that a

framed all-ones payload pattern (1111...) signal is observed for a period of time

before declaring AIS. Only the payload bits are observed to follow an all-ones

pattern, the overhead bits (X, P, M, F, C) are ignored. When a logic 1 is written to

AISONES, the algorithm checks that an unframed all-ones pattern (1111...)

signal is observed for a period of time before declaring AIS. In this case all the

bits, including the overhead, are observed to follow an all-ones pattern. The valid

combinations of AISPAT, AISC, and AISONES bits are summarized below:

PM7345 Datasheet(PDF) 96 Page - PMC-Sierra, Inc