PM7344 datasheet(111/293 Pages) PMC

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PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

Bit

Type

Function

Default

Bit 7

R/W

AMI

Bit 6

R/W

LOS[1]

Bit 5

R/W

LOS[0]

Bit 4

R/W

DCR

Bit 3

R/W

SYNC

Bit 2

R/W

ALGSEL

Bit 1

R/W

O162

Bit 0

R/W

Reserved

Reserved:

The reserved bits must be programmed with a logic 0

AMI:

The alternate mark inversion (AMI) bit selects the line code of the incoming

E1 or DS1 signal. A logic 1 selects AMI line code; a logic 0 selects HDB3 (E1

format) or B8ZS (T1 format).

LOS[1:0]:

The LOS[1:0] bits select the loss of signal declaration threshold. For

example, if the threshold is set to 10, the 11th consecutive zero causes the

declaration of LOS. LOS is removed when a single non-zero pulse is

detected in the receive stream. The LOS declaration thresholds are shown in

the table below:

LOS[1]

LOS[0]

Threshold (bit periods)

10 (E1 format selected)

15 (T1 format or AMI line code selected)

175

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