PM5347 datasheet(184/302 Pages) PMC

184 / 302 page

PM5347 S/UNI-PLUS

DATA SHEET

PMC-941033

ISSUE 6

SATURN USER NETWORK INTERFACE PLUS

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

168

LCDV:

The LCDV bit indicates the loss of cell delineation state. Loss of cell

delineation is declared (LCDV is a logic one) when out of cell delineation

persists for 4 ms or more. Loss of cell delineation is removed (LCDV is a logic

zero) when out of cell delineation is absent for 4 ms.

OCDV:

The OCDV bit indicates the out of cell delineation state. When OCDV is a

logic one, the cell delineation state machine is in the 'HUNT' or 'PRESYNC'

states, and is hunting for the cell boundaries in the synchronous payload

envelope. When OCDV is a logic zero, the cell delineation state machine is in

the 'SYNC' state and cells are passed through the receive FIFO.

The cell delineation state machine transitions from the SYNC state to the

HUNT state immediately when either loss of signal (LOS), loss of frame

(LOF), loss of pointer (LOP), line AIS or path AIS is declared or when seven

consecutive cells with incorrect HCS's are detected. The cell delineation state

machine remains in HUNT state as long as one of the above alarms is active

or if cells with a correct HCS cannot be found.

PM5347 Datasheet(PDF) 184 Page - PMC-Sierra, Inc