PM7344 datasheet(18/293 Pages) PMC

18 / 293 page

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

The T1 framer section:

• Recovers clock and data using a digital phase locked loop for high jitter

tolerance. A direct clock input is provided to allow clock recovery to be

bypassed.

• Accepts dual rail or single rail digital PCM inputs.

• Supports B8ZS or AMI line code.

• Accepts gapped data streams to support higher rate demultiplexing.

• Frames to SF or ESF format DS1 signals. Provides loss of signal detection,

and red, yellow, and AIS alarm detection. Red, yellow, and AIS alarms are

integrated as per industry specifications.

• Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving

192 bit window.

• Provides programmable framed or unframed in-band loopback code

detection.

• Supports line and path performance monitoring according to ANSI

specifications. Accumulators are provided for counting:

• ESF CRC-6 errors to 333 per second;

• Framing bit errors to 31 per second;

• Line code violations to 4095 per second; and

• Loss of frame or change of frame alignment events to 7 per

second.

• Provides ESF bit-oriented code detection, and an HDLC interface for

terminating the ESF data link.

• Supports polled, interrupt-driven, or DMA servicing of the HDLC interface.

• Extracts the data link in ESF mode.

The T1 transmitter section:

• Formats data to SF or ESF format DS1 signals.

PM7344 датащи(PDF) 18 Page - PMC-Sierra, Inc