PM7345 datasheet(17/306 Pages) PMC

17 / 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

The transmitter section:

• Provides frame insertion for the M23 or C-bit parity DS3 applications, alarm

insertion, and diagnostic features. In addition, far end alarm channel codes may

be inserted, and an integral HDLC transmitter is provided to insert the path

maintenance data link.

• Provides frame insertion for the G.751 or G.832 E3 applications, alarm insertion,

and diagnostic features. In addition, for G.832, the Trail Trace is inserted, and an

integral HDLC transmitter is provided to insert either the Network Requirement or

the General Purpose data link.

• Provides frame insertion and path overhead insertion for DS1, DS3, E1 or E3

based PLCP formats. In addition, alarm insertion, and diagnostic features are

provided.

• Provides an optional 8 kHz reference input for locking the transmit PLCP frame

rate to an externally applied frame reference.

• Provides optional ATM cell scrambling, HCS generation/insertion, programmable

idle/unassigned cell insertion, diagnostics features and accumulates transmitted

cells read from the FIFO.

• Provides a four cell FIFO for rate decoupling between the line, and a higher layer

processing entity. This FIFO may be bypassed to minimize the delay through the

device when processing PCLP frames.

• Provides an asynchronous 8-bit wide FIFO interface for accessing transmit cell

data bytes (available in either 84-pin PLCC or 100-pin PQFP packages).

• Provides a synchronous 8-bit wide FIFO with transmit byte parity checking and

compatible timing with current “UTOPIA” specifications for single PHY and multi-

PHY interfaces (available only in the 100-pin PQFP package).

Bypass and Loopback features:

• Allows bypassing of the DS3 or E3 framer to enable transmission system sublayer

processing by an external device (for example, the PM4341 DS1 Framer/LIU may

be used for DS1-based services, and the PM6341 E1 Framer/LIU may be used

for E1-based services).

• Provides for DS3 or E3 diagnostic loopback, DS3 or E3 line loopback, DS3 or E3

payload loopback, and ATM cell loopback.

PM7345 Datasheet(PDF) 17 Page - PMC-Sierra, Inc